Main team: Eliza (H Osiris), Squigly (cHP)
This team's solid
Sub Teams: Filia (Hairball HK), Painwheel (I don't remember the name but it's her assist only move)
It's called Pinion Dash. I don't think Filia gets anything off Pinion Dash. It's a good assist for being able to convert off hits you normally can't, like Big Band's Super Sonic Jazz, but I don't think Filia has anything like that. Maybe once upon a time it would have been useful to convert meterlessly off throw but with the buff to Filia's drill that's not necessary anymore.
None of Painwheel's assists are super useful for Filia tbh. This team would probably work better in the opposite order where you could set Filia's assist to Updo or c.MK (Hairball is okay I guess but I'd use c.MK before that since it hits low).
Peacock (BANG!), Double(H Bomber)
I have actually used BANG! (normally called M Gun because the naming scheme for that series of moves is tough to remember) as an assist. The hitbox on it isn't great and it's difficult to convert off (Double could
maybe do something with Monster to get a combo off it? I'm not sure, the last time I tested it she didn't have that move). Better assist options would be either of Peacock's default assists, L Bomb, M Bomb, or s.HP. I would go with s.HP personally, it's useful for getting better mixups when Double's j.HP is blocked or for Flesh Step crossups or just as a neutral assist cause it's also a projectile.
Otherwise I think this team is pretty good. And honestly it's a minor complaint since if things are going according to plan you're not going to be calling Peacock as an assist much anyways.
I don't like my Filia/Pain team because I don' think the really work together. I'd make another team for Painwheel but I don't know who to play her with, Suggestions?
Well, you could...
I'm open to learning new characters but I will not learn Big Band or Beo
=/ ok. No boys allowed, I see how it is.
Again I think the Filia/Painwheel team would work okay if you reverse the order. Otherwise... Painwheel's assists aren't all that amazing, but she can be useful when played 2nd or 3rd if you play her for DHC into Hatred Install, which is actually pretty good. Of the characters you already named this would really only be useful with Double.