*Warning; this will be edited as new and accurate information comes*
Weapons with Artifact tags
Meaning; you will need to spend 200 Excelsior Dollars to remove the artifact tag in order to remove the spending point penalty to weapon attributes.
--Example: in order to add 1 strength to a weapon with artifact tag, it will cost you 8 spending points. If you remove the artifact tag than it will only cost you 4 spending points.
1. Titan’s Hammer:
--a. Pro: 15 strength bonus. The str bonus will help increase your weapon damage base and give you 22 hit point from the str alone. Add the plus 8 Hit Point increase and you will have a total of 30 HP for a relayer.
--b. Pro: Damage Increase is 50%. But overall gear DI is capped at 100%
--c. Pro: Hit Chance increase is 15%.
--d. Pro: Whirlwind Special attack with 100% hit area. This makes leveling the weapon extremely easier than any other weapon. (keynote; mobs killed by any Hit Area will not give you weapon experience)
--e. Cons: it only spawn roughly once a month and is often not sold in the public market. Can be extremely pricey just for 10 extra HP
--f. Cons: Need to spend another 200ed to remove the artifact tag. Adding to the cost of having this weapon as a relayer
--g. Con: Due to the cost and rarity of this weapon and IF you already have 3-5 relayers done; a Cheap alternative is the Spirit of Totem IF all you are only looking for is the Hit Point increase. (see details on SoT for more info)
2. Bone Crusher:
--a. Pro: has 10 str bonus. Str bonus will add to your weapon damage base and 15 HP. Add the 8 HP increase and you got 23 HP. Only weapon beside the Titan's Hammer that will allow you to exceed the 8 str bonus on a relayer.
--b. Pro: DI is 75%
--c. Pro: easier to get than the Titan’s Hammer
--d. Con: still have to spend 200ed just for an extra 3 HP increase
--e. Con: not too many other beneficial attributes will carry over into the relayer
3. The Beserker’s Maul
--a. Pro: 75% Swing Speed Increase. However, SSI is capped at 60%, so anything over 60% is useless
--b. Pro: DI is 50%
--c. Pro: easy to find
--d. Cons: still have to spend 200ed just to get 75(60)% SSI and 50% DI increase. Not really worth it for just those two.
4. No other Artifact weapon is worth spending 200ed to remove the tag for a relayer.
--a. Yes, The Taskmaster is nice, but that is better off just as weapon (change it to a weapon with Whirlwind special instead).
--b. The Dragon Slayer has luck and resistance, but that can be easier replace with other weapon choices.
Minor Artifacts Weapons (no artifact tags)
My personal favor relayer weapon choices. A lot of good choices to pick from and all easy to get.
1. Captain Quacklebush’s Cutlass
--a. Pro: 5 Dexterity to start (saving you 20 spending points)
--b. Pro: 50% DI
--c. Pro: 20% SSI
--d. Pro: 10% HCI
--e. Pro: Bleed Attack special. This only help when it comes to leveling the weapon. I personally like Bleed Attack to kill of mobs that run away. Helpful when Im fighting multiple mobs.
--f. Pro: another great choice for your first relayer (one of my personal favor)
--g. Con: its weapon damage base is only 11-13. Which will make leveling the weapon slow
2. Cold Blood
--a. Pro: Hit Point Increase of 6 (saving you 18 spending points)
--b. Pro: Stamina Increase of 6 (saving you 18 spending points)
--c. Pro: Mana Increase of 6 (saving you 18 spending points)
-------i. Total saving of 54 spending points
--d. Pro: 40% SSI
--e. Pro: Bleed Attack Special, good for killing off runaway mobs
--f. Pro: if you only relayer one weapon, this is one of the top choices to use
--h. Con: if this is your first or only relayer, then you are lacking Damage Increase
3. Cavorting Club
--a. Pro: 8 resist in Fire, Cold, Poison, and Energy (total spending point saving of 160)
--b. Pro: Self Repair 3 (making it a great choice to relayer into an armor piece. Example relayer into a leg armor and never have to worry about repairing again)
--c. Pro: 35% SSI
--d. Pro: 35% DI
--e. Con: low weapon damage base and ineffective weapon special for leveling, making it’s a pain to level. Better off only considering this weapon after you filled your non-armor slots first.
4. Luna Lance
--a. Pro: 5 str (saving you 20 spending points)
--b. Pro: SSI 20%
--c. Pro: DI 35%
--d. Con: I rather pick one of the three above before considering this weapon or a Destroyer instead.
Special Artifacts drops
These artifacts comes from special mob, grave digging, etc
1. Butcher's Resolve
--a. Pro: DI 75%
--b. Pro: SSI 35%
--c. Con: Only two attributes will carry over for relayering
--d. Con: low weapon damage base, making it hard to level up. There are more viable options to pick from in minor artifacts
2. Dread's Revenge
--a. Pro: 50% SSI
--b. Pro: HCI 15%
--c. Pro: Hit Poison area 30%. This does not carry over into a relayer, but its makes leveling the weapon a lot easier (keynote; mobs killed by any Hit Area will not give you weapon experience).
--d. Pro: Weapon damage base is 100% poison. This does not carry over, but it does make fight some mobs a lot easier. So leveling experience may be easier for first timers.
--e. Con: No Damage Increase. This doesnt make a great first choice, since its only two attributes will carry over. But worth considering due to ease of leveling.
3. Holy Hammer Of Exorcism
--a. Pro: DI 50%
--b. Pro: SSI 35%
--c. Pro/Con: Demon Slayer. Pro Demon Slayer, to kill demons faster and could make your leveling experience easier. I am not 100% certain how the Slayer will carry over if its changed to a relayer.
--d. Pro: Weapon special of Armor Ignore. Allows you to kill faster and you can use a shield
--e. Con: Only two attributes will carry over. There are better choices to pick from
Treasure of Tokuno weapons
These are considerable easier to get
1. Demon Forks
--a. Pro: Reflect Damage 10% (since reflect physical damage is capped at 105% total, it usually takes about 7 relayers to hit that cap. Could be less if you use Spirit of the Totem to help)
--b. Pro: Defense Chance Increase 10%: I really like this attributes because casting divine fury will drop your DCI by 25%. So going over the DCI cap is a good thing
--c. Pro: DI 35%
--d. Pro: 10 resist in Fire and Poison (saving you 100 spending points IF you needed those resistance)
--e. Con: there are better choices to pick from. Find a looted weapon instead for resist, more to come on that.
2. Swords of Prosperity
--a. Pro: 200 Luck. That is a huge saving if you are looking to make luck gear. Its either saving you 600 spending points or 200ed
---i. If you plan on having many relayer, starting with the Sword of Prosperity is a great way to go. You can have many stats maxed outs with 4-5 relayers and still have a lot spending points to cover resistance, enchanced potions, etc. The ED saving (if you plan to add max luck to a gear) is unbeatable.
--b. Pro: Faster Casting 1. If you haven’t reach the casting cap of 4, this is a great saving of 50 spending points. Or if you are looking to replace a jewelry piece
--c. Con: only two good attributes. Luck isn’t that important for a first choice relayer (if you only plan on getting one relayer). More like option 2+ relayer.
3. The Destroyer
--a. Pro: Str 6 (saving you 24 spending points)
--b. Pro: HCI 10%
--c. Pro: DI 50%
--d. Pro: Crushing Blow special. Makes for faster killing during weapon leveling
--e. Con: There are options in minor artifact that will give you more spending points saving
4. Wind’s Edge
--a. Pro: Hit Mana Leech 40%. This doesn’t carry over into a relayer pieces, but for a first time weapon leveler, the Mana Leech just makes the journey easier. It’s another great choice for your first relayer options
--b. Pro: SSI 50%
--c. Pro: DCI 10%
--d. Pro: DI 50%
------i. All those attributes makes it truly a great first choice relayer
--e. Con: low weapon damage base.
Darkened Sky
--a. Pro: DI 50%
--b. Pro: SSI 25%
--c. Pro: Crushing Blow special, 50% Cold and Energy damage base, and 60% hit Lightning. All of these makes for an easy weapon level experience.
--d. Con: only two attributes (DI and SSI) will carry over as a re-layer
Looted Weapons
These can be good number 4+ options for relayer. Because typically you are in need of resistance pieces to replace your armor slots.
1. Looted weapon attributes goal of 5x20 resistance
--a. Best way is to find a looted weapon with 4x18 resistance. Then you just add the rest to make it a 5x20 resistance piece.
--b. Reasonable alternatives are looted weapons with 4x14 resistance (this will save you 56 spending points)
--c. 3x18 resistance would be a good third option. It will save you 54 spending points
--d. Con: You will rarely find a 4x18 looted weapon. Best to look at alternative 4x14 instead
2. Looted Weapon attribute goal of Resistance, Luck, and Faster Casting
--a. These type of relayer is best to consider after you got like 4-5 done already. It’s best to see what resistance you are lacking and aim to finding a piece with it.
------i. Example; you need 20 fire resistance to counter Necor forms; so you are looking for a looted weapon with 12, 14, or 18 Fire resistance.
-----------1. You are also looking for any Luck or Faster Caster to replace the armor or jewelry slot that you will be using in its place.
-----------2. Other attributes you might find are HCI and DCI. If you find a looted weapon with all those features, that’s a huge spending point saving.
Miscellaneous Relayer Items
These are items that you might want to consider relayer because of its crazy bonus.
1. Omni Magis Spellbook
--a. Pro: it allows you to cast all Druid Spells
--b. Pro: 100% Lower reagent Cost. Never worry about regs again
--c. Pro: Faster Casting 2 and Faster Cast recovery 3 (that’s saving you 115 spending points)
--d. Pro: Intelligence Bonus of 15 and Mana Increase 15. That’s a lot of Mana
--e. Pro: Lower Mana Cost 20%. The cap is 40%, so you are half way there
--f. Pro: Spell Damage increase 20% and Mana Regeneration 6.
--g. Pro: 200 Luck
--h. Con: cost you 600ed to buy. That’s costly
2. Spirit of the Totem
--a. Pro: 20 str which will give you 30 HP. Only the Titan’s Hammer can give you that much HP. Additionally, the str bonus will increase your weapon damage base by 1 atleast
--b. Pro: 20 Physical Resist. Great for countering protection spell penalty
--c. Pro: Reflect Physical Damage 15%, helps you get to your 105% RPD cap
--d. Pro: HCI 15%
--e. Pro: since it doesn’t have any Durability counter, when you relayer it into an armor piece, no more repairing
--f. If you already have 3-5 relayers done, SoT is a great way to max out your hit point. (some consider the "poor man" titan relayer)
--g. Con: You wont get any Spell Damage Increase or be able to add any other attributes to it.
Special Notes:
Swing Speed Increase bonus can be disregarded entirely if you achieve 240 stamina. For 240 Stamina you will need a base of 150 Dexterity, Jackal’s Collar (15 dex), Batwing (10 dex), Gloves of the Pugilist (8 dex), 24 dex from 3 jewelry pieces, Hunter’s Headdress (8 dex), Arms of Tactical Excellence (5 dex), and atleast two other relayer pieces to get over 240 (252) Stamina. *per Devlin and +Colibri post see http://www.uoex.net/forum/viewtopic.php?f=1&t=5458
Momentum Strike for those that have Bushido. Momentum Strike allows you to hit multiple mobs at a time and kill faster.
Wraith Form for those that have Necromancy. Wraith Form gives your weapon mana leeching ability. If you like to spam specials while leveling, Wraith Form will keep you happy.
Add those two combo of Momentum Strike and Wraith Form makes any weapon worth leveling. Despites its weapon base and specials

Please feel free to add your own weapon choices and I’ll try to add it as one post.