Bella and Band with Val cMK is straightforward. Less utility but you won't be dropping HBypass.
Val with HLnL goes to Fedora Ninja and a variety of other players who messed with it, including me. Learn the sHP XBypass (H is great!) + HLnL starter and learn to call it to cover crossup resets from rejumps (and even same side ones, of course.) You'll be doing frontloaded damage and it will hurt.
Band with HLnL, I believe Mike Z also toys with this? Drewski, IIRC, uses MLnL, however.
Bella with Brass, I forget who actually plays this team, but you can find it if you look around. Be prepared to vomit damage and do almost whatever you want.
You lose conversions that MBeat would give you, but if you have HBypass, this is of little concern depending upon your execution, considering HBypass is more reliable for some stuff. MBeat still does some things HBypass doesn't though, it's not simply better in every regard when it comes to conversions.
You will plow through characters with this team. Pummel horse is your practical conversion but Kanchou and some other tools exist to convert from it depending on the situation.
Don't be afraid to use similar tools you find with HBypass here. cMP LLnL + HBrass near the corner > dash cMK / dash sLP / dash jLP (Grab Bag reset, hue) can be used to convert.
Go for command grabs behind this thing. Just do it. Just go on the offense and cover it with HBrass.
Valentine with Brass.. is so much better than I thought. I wanted it to be great. Then I didn't like it and now I love it.
It's not HLnL. You do and do not use it like HLnL. It requires some creativity to say the least.
I feel HLnL is easier and more straightforward when it comes to frontloading your damage, but HBRASS HITS LIKE A TRUCK SO IT'S WORTH IT IF YOU CAN DO IT.
It also sets up some crazy resets right after all the damage hits. And you have Brass. Enjoy countercalling. Val is also capable of protecting it, as big as BB is and as much recovery as this has.
If you run my team, prepare to spend poison and meter. Just spend them on poisoned Val+HBrass starters into EKG > Dynamo > whatever. Your opponents will bleed and suffer.
This is an annoying pairing to contest.
sHP + HBrass > L or MBypass > jLX and then anything is my go to starter.
HBypass is, IMO, not worth it, but try it anyways.
If you land HBrass at the right ranges, or do the poison/shuriken starter midscreen or get shuriken+HBrass, do TK jHBypass to convert.
sHP > Shuriken/Vial Toss + HBrass > TK jHBypass [optional jMBypass] > do whatever you like.
Val/Copter is standard and practical fare. I'm sure you can figure this out/find someone who plays it.
Band/Copter seems the same. Apply your pressure.