Thanks for the suggestions. Here's the thing: Poggle's buff is a percentage. If you use him on characters that hit for 6k, his buff is worth 3k. If you use him on characters that hit for 3k, his buff is only half as valuable. This team doesn't have the sorts of heavy hitters that are needed for Poggle to make sense. He would just be taking up space.
Without Luminara this team dies 90% of the time with or without Poggle. It's just not the sort of team that can win without a good healer, and her ability block is also very often important (for using on, say.. Poggle!) :)
As for Daka, she's the best stunner on the team AND among the fastest characters AND has a heal AND can raise dead AND allows anyone to self-resurrect. I will have a hard time ever playing any team without her again. :) Very respectable health too: mine currently has 11k.