User blog comment:Linathan/Unit Spotlight: Fei and Fang/@comment-74.15.209.213-20150524172100/@comment-74.15.209.213-20150525110221

So I guess here is the conundrum - if you bring a Feeva into your team, there she basically takes away the issue of filling gauges completely. This takes away / undermines F&F's utility in their SBB (fill 9 BC). You are left with a unit that provides a spark buff.

Often, I don't find it justifiable about to give F&F a slot just for their 1 spark buff, even if it's 2nd highest in the game... as there is usually a BB manager in the team already (Feeva).

I tried having F&F + Zelnite. That works a bit better synergistically but it doesnt beat Feeva's level of utility. It's cus of these things that I'm iffy about the usefulness of F&F. I'm often hard pressed about carving out a spot for them in the team...