I beated 123 with mei mabui tenten af at 51k power. But i needed to get a full combo crit from tenten and a crit n tenten mystery after that to nuke that mb. Otherwise ther were any other ways with water main to pass that exam. Power suggested 43k. I expect that the suggested power is the power needed to beat it with very basic lineups at most in 2 tries, not the one needed with supermeta teams to have a chance in 1000 to pass it.