For me its got to be Rk-mma by far. Unlike wushu and lenshu3ng running is not an option (unless its the last 120 frames). DMs are very fair in this mod, very rarely will there be a "random" DM.

RK-mma is my favorite mod just because I feel its the most balanced.

Other contenders would be ABD, and Tk i think. Oh and Spirit Wrestling.

The reason boxshu_mushu became such a success in dueling is because its very easy to pick up and its very fun.