Pretty much this. I kinda want to ult Mastering and max-skill Lilith, but I have two max-skilled copies of every color heartbreaker.
EDIT: I meant to do this earlier, but I wanna play the game where you guys look at my box and tell me what I should try to make. Right now I'm trying to work on the Athena team, but what about after that?
Oh jesus look at all of this green.
Perseus, Meimei, Gonia, Amitaka, Chu is legit. Almost Pandora tier once maxed. You have so many goddamn skill boosts that all you have to do is push buttons for orbs and everything dies. Once Perseus ult comes out here then you'll really be talking.
Eventually replace Ami/Chu to go full god tier. Green Ripper actually can work because it changes orbs from dark to green, giving you either a full green board with Gonia, or a dual color board with Meimei. Too bad his awakenings kinda suck. Also with the full board combo you can have a +orb sub like Melody or Canopus for the max burst. The best combination is situational so it's good to focus on all of them to keep your options open (longer dungeons you want more orb changers, shorter dungeons with a stronger final boss you want +orbs).
Don't bother with stuff like Mari and Fafnir. The extra row awakening is not worth the shitty actives. You want as many orb changers as possible for heroes. If you can get Green Valk then she's way better than Chu.
You're probably better off building this than Athena. With Athena you want stuff like Leilan and Izanagi who you don't have. Meanwhile you have everything you need for a solid Perseus team.
Also other than that, Kushi is a great sub for any team. Comes in handy for dealing with ridiculous preemptives.
edit: what the fuck you have guan yu okay use him too
okay fuck chu time to go full skill boost
Perseus, Meimei, Gonia, Guan Yu, Ami
8 skill boosts means max skilled Guan and Perseus is up on turn 1. Max Meimei is up after 1 turn. Ronia after 7 turns.
6 green rows, which doesn't sound like that much but remember Heroes are x4 while Ronia is just x2.5 and mono teams are usually x3 so other teams need more rows just to keep up.
4 skill lock resist. Replace Ami for someone with another resist for the guaranteed if you need it.
Actually Ami could probably be replaced with a lot of stuff. Athena, Canopus, Melody, Melon Dragon, Green Ripper, whatever, you got options. I think I kinda like Green Ripper for the Full green board option.