I decided to just level him. I already had him 7 stars, but went ahead and brought him up to level 77 with gear 8. His AI is definitely broken (as some of you have pointed out). For now, I have had to pair him with maxed RG to get much use out of him. Aside from bad AI, when his taunt action is used, he does not permit a rebel ally to assist (per Ackbar's leadership ability).
The team is Ackbar Lead, Leia, Rey, Sun Fac, and RG.
Great offensive character, terrible AI. A bit miffed at why they would chose to have him attack first to recover health. I thought characters normally started with full health....(being facetious)..
**EDIT - I just realized how Sun Fac destroys teams with a Royal Guard. Its pretty impressive. Since Sun Fac's basic ability removes taunt (or any buffs for that matter), you are free to destroy the heavy hitters without much of a care for RG. Just went through a PVP team in the top 20 with ease (not a single character loss) despite Old Daka getting in a Rey revive. Went after Rey first, RG taunted (Sun Fac dispelled), killed Rey, followed by Daka, then QGJ. Polished off Count Dooku and finally RG. RG was basically rendered useless. Good for this meta.
Such a great player to use..........but man I will have to monitor the slide in PVP. I have a feeling that teams will easily deal with Sun Fac by stunning the crap out of him. If only the AI could be a pre-determined input assigned by me......booo...hooo ;)