DPS has to be on the ball for first boss as well. Else they will never be quick enough to either burn the boss or quick enough to burn through the adds. Being geared AND experienced definitely helps with efficiency of an AK run and less chance of wiping. I remembered when I just started AK with less than satisfactory gear. I learned my lesson from that date and the cussing I received. But I learned that getting the gear makes a worlds difference not only for yourself but for your teammates as well. You really shouldn't have to be carried through dungeons because you are lazy to acquire what is needed. People get yourself some DL pieces from CM before running to AK please (Its mind-numbingly easy enough, and at least a Primal weapon or use your GC weapon.)
Second boss is a DPS race, so that further requires for DPS to be geared else you lose all the safe zone to stand. Third boss is a DPS race to some extent but the tank definitely needs to know what he or she is doing, but honestly I've never seen any group slow enough to lose all their columns to hide behind from Imminent Catastrophe.