>>545883198
Seems like you got your teams covered, Rei solo sustain might be a little cope for Zero System though, dont be afraid to play something like Rei/Mika/Kayron if you need the clear.
Speaking of Zero System, I'll give you some tips as well: when you first merge a world which chaos you choose will stick with you and keep scaling in level until you fail. The recommended method is to avoid hard debuffs like no rest, discard 1, max health debuffs, and dont do Nightmare until you reach chaos 9/10
As for which Chaos to choose:
Chaos 1 I avoid it like the plague because it has the most run enders, and the final boss is a "Did I find the Rally skill from the shop?" check
Chaos 2 It's full of AoE, and its a Khalipe check, you can do it since you have Khalipe
Chaos 3 Shill card spam units like Kayron/Tressa, do beware of the Normal battles at the end you might run into the dog man. This one do offer the good mythic gears for Mei Lin, Tressa and supports (Mulligan armor)
Chaos 5 Playground for Beryl/Haru, I find this one the easiest and farmed this to chaos 10 with my Beryl. The gears are kinda sad however since they're all anti shields
Chaos 4 Personally I feel like this one is a harder version of Chaos 5, its the same shield spam shenanigans, but they deal way more damage, however the Elite monster cards and gears you can get from this are CRACKED
>>545884139
Chaos 3 has her best Mythic weapon
>>545884236
No u