How’s E6 rmc compared to E6 hunt march?

I have personally tried FX/robin/aven/rmc and it feels comparable to March, the only problem is this was only against the feixiao boss (idk about her resistances but I feel like you do less dmg when the boss isn’t weakness broken). I just wanted your opinions on rmc with her, as a more supportive option compared to March (though ig March has her fair share of buffs).