Alumni is the only team that has beaten blackout, so yeah. Every time blackout has faced apostles/gteam? they win. In terms of skill it seems like it's alumni, then blackout, then rest.
Saying "rest", because gteam and apostles/war/rectify have been pretty even, and I think both have beaten each other during separate tourneys.
No idea what apostles' or blackout's lineup is, so things could be different, who knows.
Is the tourney this month or next month?