See this, how can that not be the Rani.

QuickSlowsilver is so the Rani, here is why...

Mutant = Time Lord Edit

Slowsilver is the Rani because he has special powers, like a Time Lord. How do we know Time Lords aren't super fast. Also, he didn't have any problems with having himself killed to save Hawkeye. Hawkeye is obviously a social experiment so the Rani wanted to preserve that experiment. Also, being shot is nothing to a Time Lord.