I've never been one to really like playing MP mods competitively more than for just fun at all really. But when i did do some of it with the old elo and rank system, and way before i even got into replay making.

-Lenshu variants
-Ninjutsu
-Wushu variants

Were some of the mods that i really enjoyed playing and deemed myself to actually be good at once. Nowadays i barely touch any MP mods that aren't replay making related since a few years back.