I've been playing around with team comps a bit and seeing my average 12-3 clear times to measure performance, and I feel like Kokomi offers greater role compression as a hydro applicator and healer to substitute Mona and Diona. In doing so, it raises the option for another cryo subdps, so I use Rosaria as a buffer to further invest in Ayaka's crit damage and get 70% crit rate bonuses from reso, bs, and her passive, with a base of 15/290 on Ayaka.

From an average of 3 runs each, I was able to do 12-3 in:

Diona / Venti / Ayaka / Mona: 1m 28s

Rosaria / Venti / Ayaka / Kokomi: 1m 20s

This was without TToDS on either and standard builds with no buff differences (4 pc noblesse). Rosaria functioned well enough as a battery for my Ayaka and offered some extra damage with ~10k per tick of her ult. That aside, this is purely anecdotal, so I wanted to hear some other takes - does Kokomi in her current state function as a Mona substitute or is the original Moryana comp still better?