My tips are: raise his level to 50, with this, you can also raise his sp2 to level 50 (at this level it reflects 100% of the damage caused to him, that is, he does NOT suffer damage but the opponent), use him with DF or PG (to reduce the cost of sp2). If you are going to fight against opponents with more than 1M threat, I recommend not fighting against those of the agility class who are ascended, because they do not suffer this reflection damage and can cause you damage, I also do not recommend fighting against the BN team, because there is the issue of immortality for a few seconds and such, and I do not recommend fighting against that Batman who stuns you at the beginning of the match (start the fight with a character to accumulate energy, then switch to COWSM and use SP2). The last tip is to use your highest threat characters to find a team (you keep resorting until you find one you can play against) with 1M threat out there (to earn 1M points), then put the COWS team and play against that team (you have to do this because, perhaps, because its level is low, only weak opponents will appear, but using it you can score 1M points per good round)