I just need the black fairy on the last level and I'm done. 30 runs so far 5 silver 2 plat.
I'm not stressing it though. I don't need the unit and this gold rush was a lot nicer to me than the last one.

I think the first "GOLD RUSH" gave me a false sense of how easy they would be, as on that one I got all the units with time to farm dailies.
last one I didn't get all the units (got the ones I needed though) and this one has taken my last chocolate (just the one) and not yet 100%