Originally Posted by Iru

You answered your own question: which ever one produces more DPS is better.

You're a pure damage dealing class (ignoring the small raid buff utility each tree brings) so your role in the raid is to get things to dead as quickly as possible given the mechanics of the fight. Higher Damage Per Second (DPS) equals dead sooner, all other things being equal so the answer is always what gives the higher DPS. Crits & AP are just how you get there.