Which Rank-up decision do you regret the most?

I'm interested to see if you've had champions that you may have regretted ranking up initially, but ended up being happy you ranked them up? Or maybe champions you ranked up a while ago and regret your choice looking back at it?
0
Comments
Quake.
Id kill to rank her down and rank up my wasp.
She seems just boring to me, is not that I can't use her or anything, I'm pretty good at her, but using just makes me want to quit the game.
I initially ranked up Angela with no intent on using her but she was my only decent cosmic at time but slowly fell in love with her and use my 3/45 on map 5 everyday and then pulled a 6* from cav crystal and was over the moon.
He was my first 5* dupe, needed to increase prestige at a time when most didn't have R4's. Would kill to get a RDT, he's a useless pile of garbage.
I also regret quake. Although the time and situation of t2a expiring she was the best choice. I still use her in one iteration of map 7 we get for one fight. Beyond that I almost never use her.