well its simple ALL agi gears have shit load of ap on them and haste is important for your 2 piece set bonus proc's and agi contributes to your Crit count.

while Str gears give 2X ap per str and your belt gives you a total of 302Ap, and only 83 crit rating, in the end of the day you have to see what you really want or need but from your gears it might not make THAT much of a diffrence

brah kingslayer is shit easy.......