Here is a table of which potions to make for gains, up to GM:
I'm not sure what to make above GM sorry.
Start Skill Stop Skill Potion Reagent
25.0+ Alchemist NPC - Moonglow is good spot, or in Excelsior Halls
25.0 35.0 Lesser Explosion Sulphurous Ash
35.0 45.0 Agility Blood Moss
45.0 55.0 Total Refresh Black Pearl
55.0 65.0 Greater Agility Blood Moss
65.0 75.0 Greater Strength Mandrake Root
75.0 85.0 Greater Heal OR Greater Poison Ginseng OR Nightshade
85.0 98.1 Greater Cure OR Greater Explosion Garlic
98.1 100.0 Deadly Poison Nightshade
You can sell all of the potions after 55 skill for some decent profit.
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