Unique powerful randomized combos

My favorite thing in randomized is to find the unique combos of mons, moves, and abilities that make them super OP. Many are obvious: huge power on any reasonably strong mon, for example. But there are also some less-obvious extremely op/cool combos that I've found. And I'm wondering what other potential powerful synergies might exist in a full randomizer that I might not immediately think of. Any suggestions?

Some examples:

Prankster + me first

Sniper sirfetched

Regenerator + shed tail

No retreat + ghost type

Any others that might not immediately come to my mind when imagining OP mons in a full randomizer?

(Note: Many of these combos are probably immediately obvious to anyone with a brain -- but I didn't immediately think of them, so I'm wondering what else I might have missed)