I think the point of BB-8 in the Zader version is to provide Illuminated Destiny--Speed Up, Crit Chance Up, Crit Damage Up, and Offense Up for four turns. Yoda only adds survivability--well, Master's Training ads 25% offense. In the Ackbar Team he provides assists as well. I haven't really played with that team well modded, but I don't know if you will get quite enough damage even by enrage without ID.
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The damaging power is much less important