My Last Pick is Living Lightning
my teams are both teams based on the Outsiders, first team is based on the post Graduation Day team, second team is based on the classic team
Winter Soldier: Nightwing
Omega Sentinel: Indigo
3-D Man: Captain Boomerang Jr
Colleen Wing: Katana
Mach V: Atomic Knight
Living Lightning: Black Lightning
Okay, I don't know a lot about DC's Outsiders like Atomic Knight, Halo & Looker but, from the little I know, those are some good picks (I really like Mach V as Atomic Knight). And the rest of your picks are spot on.
Your first team, though, is my favorite.There's some cool characters we haven't seen interact together (Winter Soldier & Valkyrie), some outside-the-box thinking (Prophet), some that just fit really well (Omega Sentinel, Quasar) and some unexpected picks (3-D Man).