More strength will help with hit points, will help you stay alive longer. Drop intelligence to get it if you need it. You have to be stopped to fire the bow, but you can fire a shot, take a few steps, stop, fire, take a few steps, stop, fire, etc. As your strength improves, you will also hit harder.
Yes, the 220 dex guide will tell you 125 strength, 125 dex, 50 int. If you fight yourself a lot, and don't use pets this is awesome. Once you get GoC armor, your int and mana go up a LOT which is why its not needed, or as important as dex and strength. I don't know if there is a bow that you can shoot while running, but the reason many people use yumi's is because of the base damage, and the specials. Armor Pierce and Double Shot are both good.
Raising Chivalry and/or Spirit Speak can also greatly improve your survivability.
If you type ''I pray to the gods'' in game you can see a list of spells that's using Spirit Speak. Touch of life is the best healing spell in the game and Angelic Faith give you +20 to every stats which is good when you lack it at first.
Chivalry has a healing spell too but much less efficient than Spirit Speak. But there's a couple of buffs (ennemy of one, consecrate weapon) that'll help you raise your damage with the Yumi (and any weapon) by quite a lot.
Other than that If you can use Razor or EasyUO there's way to setup auto-bandage when you're under a certain % of your life. (Not too sure on Razor tho)
i am feeling like paper.