actually if you use beams right then they are not useless,just dont use those really long to charge ones like KHH or something....try generic beams and BA,they are ok for melee
and for a tip in the game,learn teleport control,the best controller on teleport will win if he does it right.....esp. together with swoop and beams(yes beams)
and one more thing,dont recharge for too long,having a full ki bar can be good,but it can also be bad,so stick to recharging your for lets say....half a second?That's already ok for me and I get decent scores with it....unless Im up against Z clan or ape....