I've been killing it with ZFGN, riding from 5-6 range to right around 10, and scalping in & out since as it floats around. I'm holding a few thousand right now and it's started to gain some ground this past week quite well. Long term expectations from many are 12-15, but 10 is my "easy target".
I'm heavily into LABU as well, though I know many don't like it. Of course, they like LABD instead based on current trends alone so that doesn't say much. You can get in & out of those quickly and profitable as well if you want to be active; it's easy to see how it tracks and where it'll go. Bio sector has been annihilated since late Dec; once it recovers this alone ought to make my next few years