I'm including Sebastian Weyer for 4x4 and Kian Mansour for OH (Although he doesn't have any records yet, it seems inevitable that he'll break at least the average soon. Feliks single looks safe for now though :)) But yeah, Feliks has shown that he's still at the top, demonstrated most clearly by...
I'm sub 15 and I randomly pick between doing a U then U perm from the front, or U' then U perm from the back. I don't really have a system for it. In fact, I've seen Feliks in this position and he did a U' then a U perm from the back and a U2 at the end. This is the solve...