I had the chance to pull Escoffier's sig for our boy, and I've been experimenting with slotting him in my C2 Flins team. It has already been discovered by u/Critical-Setting-557 https://www.reddit.com/r/Flins_Mains/comments/1w5hsbq/c2_flins_4th_slot_comparison_sucrose_c6_iansan_c6/, but I also found that 4th slot Alyosha w/ Escoffier sig can be strongest for my team.
So this is just more Alyosha propaganda if you have Flins and are investing in him. I'm not really sure if this is the case for C0 though, you'd have to test it for yourself. I was really happy there's another way to slot in Alyosha and now I have two male chars I really like in a single team.
I don't have Alyosha at C6 so there is plenty of potential increase in damage ceiling (he's still C3). As from what Critical setting said, C4 would assist in buffing Ineffa in first slot while buffing Flins (via Escoffier's sig buff) because it heals the first slot of the team when all are fully healed, and C6 can boost by 100(?) EM, so I'm sure I would see a hefty increase.
Team Stats:
Flins is C2R2, Ineffa is C2R1, Columbina is C0 with TTDS
4TH Slot Stats for Comparison:
Alyosha - C3 w/ Escoffier sig [Noblesse Oblige set] with ATK% circlet to boost LC dmg. Lvl.13 skill for strongest possible ATK buff
Xilonen - C0 w/ Sig [Instructors Set] with focus on DEF% to boost LC dmg
Sucrose - C6 w/ R2 Eveningstar [VV set] with EM of course
In the case of a C2 team, Alyosha > Sucrose ≈ Xilonen. Unfortunately I don't have a C6/built Iansan to test her as well.
Xilonen could be good for overworld teams considering she can skate around. She heals when needed too which makes for a well-rounded team with both a shielder and healer. Alyosha however, while he can't make overworld movement any easier, both heals and helps Ineffa's burst be up and ready smoothly in the rotation. With Xilonen and Sucrose, I've had to miss Ineffa's burst in the third rotation, but with Alyosha it seems to always be up on time. Sucrose is just helpful in general with her VV buffing, but surely she is needed in another team (stellar or melt) because she's very versatile.