I specced AP from the beginning cuz I played Rogue, Mage, and Warrior in WOW and the close range abilities, mobility, and relative survivability added up to a play style I thought I would enjoy. I'm level 42 right now with pyrotech pvp gear and basically decked tfo for my level. I've had a couple games with 300k+ damage plus 15-30k prot using neural dart and I get highest medals 75% of the time. The 30% crit increase applies to flame burst, immolate, and rocket punch, btw. Spamming flame burst feels kinda dumb, but it's basically like improved scorch for mages in WOW. One thing I've been having fun with is my Relic which I pop for 150 alacrity and burn all my channeled abilities on clusters of players. I haven't tried out the Pyrotech spec yet, but it does lack the close range aspect of AP which I love.