from what I have heard (anecdotal only!) the avics, and T blondi seem to have the most problems for people.
I have had 1 A avic die from a bad molt, and it's the only T I've had die from one...so I don't know...
I now have 4 A versicolors, and they make me really nervous! My two tiny babies just molted again, and seem to be doing wonderfully. The juvies that I have also seem ok...but I just got them a couple weeks ago.
I would feel totally unprepared for T blondi!