Dunno about HM BT.
But I do know trying to heal SOA HM is just too power intensive.
I'm a full heal spec. I even have diagnostice scan restoring mana when I cast it and yes I am forced to cast diagnostic scan in order to restore my power pool.
I've managed to heal HM Kaon Under Seige's final boss on our third attempt and at the end everyone was dead and I finished off the bosses last 2k health with my blaster, leaving me with 3k health.
In HM SOA I spend most of the time using diagnostic scan to keep my power pool up, so I can do burst healing when needed, but I always end up draining my power pool to 0. Sure we have a power regen, but it's on 2 min cooldown, and tactical advantage, but it's hardly enough for HM boss fights like SOA.
bleh