#5 won't work, because being a heavyweight has nothing to do with wins/losses. For example, say someone had a 10-10 record. That would be considered a welterweight according to your scale. What if they had done 20 battles against top tier members with wins against: RULE, ReeFer, & DaDDiO, & losses to UA, Jason, & Illimit? I'd classify a battler like this as a heavyweight. Your way would encourage sniping so that members could have that good record & "heavyweight" title.
—Knowledge dropped.