Treek does a better job than the other healers. The CZ-198 SM flashpoints are soloable, but Core Meltdown is way easier with Treek. At least she does stand out of range healing herself only, like Fishboy (Gus) or Doc. Her AI actually seems better.
I couldn't solo Core Meltdown with Doc (full aug'd 72s, no set bonus) or at least gave up after 2 losses. He just wouldn't get out of the way of the final boss. I would get CC'd and his healing wouldn't come fast enough since he was getting raped.