Mobile Velah:
Still has threat and aggro mechanics. If it is a melee, chomp him/her if he is only standing on one place. If it is a caster or a range, don't run around crazy chasing it, cast spells on that toon. Fire breath, cometfall. So no kiting.
Resets aggro, flies around then lands again. Dispels Spells. Dispels your GH. Constant Fear Aura. That's it!
If you have less threat but great DPS, it somewhats irritates her, so she shoves you with her wings.
I know this is for Velah Thread, but I like the aggro mechanics for the Abbot.
Sorry for the Derail:
Asteriods: It would be nice for example that abbot will call down hail of asteriods instead and you shoot it down with boulders.
Goggles: He will call down a spell to shift the floor and you need to wear goggles and call out where to jump. But no instakill.
Ice: I don't know, Inferno still I guess.