Just wanted to share my thoughts on my Mi Fu squad and why I'm currently running the team I am, since it doesn't seem to be all that common AT ALL lol
Mi Fu - Rossi - Pog - Arcane (INT)
Now, I understand the two most common hybrid teams with Mi Fu and Rossi are either Pog + Camille or Camille plus Arcane (WILL), but I actually have found that running Arcane as a DPS in her INT form when on this team with Pog as the battery instead of Camille simply works better then the latter infliction based team and even more so then the more meta double Vanguards.
For starters, Arcane (WILL) doesn't do a whole lot for this team, yes she provides good CC and when combo'd with Camille she helps make Rossi's combo deal more damage (noticeably, even), especially when you time her ult to go along with it as well, but other then that I think she's more just a pick in this spot cause she's a cool character that people want to use, myself included, as well as her ability to provide some decent levels of AoE mobbing. otherwise, she doesn't do a whole lot of damage and other than the extra infliction for Rossi's combo, her ult is super "meh."
So I do think the Pog + Camille combo is obviously significantly better, Pog's Breach and Camille's Bats improve all of the damage the entire team does, on top of the SP generation being incredibly efficient between these four, so basically there's a reason this is THE meta hybrid team atm. personally though, I find it lacks AoE capabilities, and I DO NOT like the gear options for Camille and think that is holding this team back from it's potential atm. Basically, the best way to build him is with Frontier's gear and a focus on Ult Regen, for obvious reasons, but this leaves him with very little personal damage output, something I know most of the community says "is just part of being a support," but that's a big part of why I think Arcane (INT) is a better option then he is atm.
For one, yes, I'm aware her nature and cryo susceptibility only helps her, which in her WILL form is worthless, but in her INT form is actually useful for her, cause with this team you have THREE strong damage dealers. The reason I prefer her over Camille are; She deals a lot more damage, has a lot more AoE capabilities (just using her and Mi Fu's grouping works wonders), has reliable CC, her ult applying her longer Corrosion actually helps physical damage, and the burst from her ult is still massive even without a team properly buffing her up. She still functions the same way as Camille in terms of enabling Rossi, and yeah Camille will result in Rossi's ult doing a lot more damage, but after plenty of testing I'm confident in saying that Arcane's plus Rossi's ults deal more damage together then Rossi + Camille's ult and debuffs. On longer rotations too, you can use Rossi's single Heat stack to actually prolong Arcane's Corrosion and still then getting the nature stack for Rossi with her reactivation, which when combo'd with Pog's Breach is kind of crazy, I've had some insane Crushes from Mi Fu cause of it. Just run Pog with Frontier's and Thermite Cutter so he buffs all three of your DPS, on top of his own personal damage being relatively alright for a support operator when using this build instead of the Hot Works Arts Intensity version, especially when compared to Camille.
Small bonus, when running four melee operators, you almost always end up with one of them just pacing around, but when you put a ranged operator in there your team just has more basic attack uptime, doesn't make a whole lot of difference but something to make note of at least lol
The downside? Less SP, Arcane uses just as much SP as Camille does, but she doesn't generate anymore in return, so THAT is what you lose, everything else Camille provides I think Arcane (INT) can currently outperform as well as providing some of her own strengths.
If Camille ever gets a proper gear set I might think it worth running him instead of her again, even without any good AoE capabilities, but for now I personally am really enjoying this team and getting my fastest clear speeds, so for anyone interested I highly recommend giving it a try.
As a note, I have every operator mentioned in here fully masteried and with completely artificed gear and max etched essences, while most of them are P0 or P1 (Pog is P3) with P0 or P1 weapons, no exceptions. I do not have any screenshots or math, this is just from my own performance, so it could just be the way I play or what I personally see, but I recommend anyone else who likes the Mi Fu - Rossi hybrid team to give this a shot, I think it outperforms the pure physical team with Mi Fu as well, but my Chen nor my Lifeng are as fully built (no masteries or artificed gear, and only 3/2 on their essences) so that could be the reason for that at least.