As per title.

I only have Blake, Weiss, Ruby and Prryha so I can only comment on those.

Prryha sucks, period. She's basically a crap Sworden.

Blake seems like a meta countering unit designed to troll PvP/PvC that works well in many teams. No specific synergy with anyone else, she's a full package on her own.

Ruby(tSA)/Weiss/Mew. Aubrey

Aubrey solves the issue of Weiss and Ruby's buffs being way too short and tSA boosts Weiss's weak CC stat to generate more of her blocks.

With this combo, Ruby will be basically doing neutral damage in PvE whilst both Weiss and Mew, especially Mew, get fed with 3cs. You can have Aubrey up 24/7 since there is so much block spamming once Ruby gets off her initial 3c.

Of course, this all falls apart in 7H3 because no fun allowed there with goddesses.