Remove ATK stacking

Initial attempt to remove stacked ATK modifiers.  Values appear to be much closer to normal on smaller sample sets but may have been adjusted too much.  Need to confirm with real data.

Tests conducted against Dark Titan before modifications show "avg" damage at 18k+ for a level 62 player which is impossible.  Warpath (Lore) was stacking on top of Concentration.

Tests conducted after modification show "avg" damage at 8-9k (which seems normal based on my experience).

I have not tested all abilities/cards to determine if there are side effects to not updating every card.