Diona & Kazuha as a "budget" CitlaliC2?

Edit: Less a "How good is this?" and more a "huh, is it kind of neat that Citlali is a fusion of 2 older units".

My Mavuika is still low-levelled, but before any more pulls, I've been paper-crafting the idea that Diona-Kazuha do basically the same things as Citlali, except for Nightsoul, though with more effort and at the cost of another slot.

ER-shred, ED-buff, EM-buff, weak-cryo-application every 1.5-2s, shield.

I think a BenQ->KazE->DionaEQ->KazQ->(BenE->KazE->)MQC could be powerful.

Obviously the team takes a hit from loosing a unit, but the function is similar.
The movement's SPD buff might even do something to the donuts, though probably not ;) .

Any thoughts.