I don't remember specifics... but I do remember strength increasing damage or I thought, and int having very little effect on magic or none at all.

When solo leveling, is a good idea to make sure you get the max HP at level up(there is a 1-6 hp per level up and at certain levels a +25 bonus.. or so I remember reading).

Agi... I can't honestly remember reading it helped anything. I thought your hit rate leveled independent of agi...
same for luck and vit as far as I know.

The general point though is that those stats have very little effect or hardly noticeable effect in this version, where they have much larger effects in DoS.

However Unne would probably be the one to ask specifically for facts.