Does STR still determine Ryan's damage?
 

Or is it a different type of attack?

STR determines all skill damage for all classes. You get a % boost depending on your STR level, which you can check by opening your character information and hovering over STR.

It affects your melee damage as well, 3 STR = 1-1 damage (I think).

Right, for melee.

But what about attack skills?

melee = attks consisting with a, s and space (lunians failed to coin a better term)

EDITED TO HIDE THE FACT THAT I'M NUB xD

Completely wrong.

33 Strength=1% Skill Damage

After 501 Strength, it is (Strength-1)/500)+1

Or something like that :X.

lol right it was 33>1 and not 1>3 {if you get what I mean xD}

ok sorry