Might = Block, Parry, Damage, Damage Mitigation
Fate = Regen Morale and Power in combat
Vitality= Increase Maximum Morale, regen Moral in non combat, damage mitigation
Will = Power regen non combat, Maximum Power
Agility = Evade parry, damage with ranged, reduce miss chance
I have proberbly missed something.
And here is some number crunching....
Each point of might seems to boost common mitigation by .02%, block chance by .027%, and parry chance by somewhere between .0067% and .0077%.
Each point of vitality seems to boost morale by 3, wound resist by .0235%, disease and poison resist by .0176%, and shadow and fire resist by .0509%.
Each point of will seems to boost power by 3 and fear resist by .0256%