>>1151747
Break teams want very specific buffs like WBE and Superbreak damage before anything else, making the gap between running any combination of RM, HMC and Fugue or not so massive that even in 2.x it was kind of a meme (with the exception of GODhill running an action advancer). The biggest restriction for Castorice and Evernight teams is being incompatible with ATK buffers, otherwise any amplifier support will work well in the 3rd slot assuming you have Hyacine too to activate Darch's path-specific buff and just keep the team healthy in general, I'll personally probably use Cipher if RMC needs to move to Yae's team as EMC. Cyrene is still the best 3rd slot for now, even better than E1 Tribbie afaik, but without vertical investment she'd also be the first to be replaced if an amplifier stronger than E1 Tribbie comes out, the other three members have such perfect synergy between each other that's also very niche that they may stay as an inseparable core until EoS.
>>1151760
Feixiao also doesn't have a restriction on the frequency of ally actions, she just gains stacks each time an ally attacks while Cyrene can only get a stack from each character once between her own turns. This restriction doesn't apply to memosprites which makes Hyacine her best battery by far but doesn't work with joint attacks for some reason which makes Aglaea charge slower than she should have.