I'd say Summoner's Lineage first, simply because I had a similiar idea a while back that I wanted to do with someone. Then Symphonic Strength, cause I've been craving to be a part of a magical girl team. And finally Blight, because you mentioned Bloodborne. ;D

Either way, I'd be very interested in joining you with whatever you end up doing; I always wanted to be part of a small group rp.