nuttycide

Bastion sounds like a good name for OP's AT idea. The idea for a support/armor is interesting but as others as pointed out leveling would be a pain if we just took the skill sets as they were. One way has been mentioned already, with just replacing some troller/armor powers with more attack powers. The other is giving armor powers some passive or toggled power that adds damage to even no damaging powers (within reason). You can even have some that have a special ability that would make it where the higher your resist or defense you do extra damage.