Eh...I don't think Grace gets you much in that composition, and further, the rotation order you're proposing will hurt you immensely.
ZZZ excels in mono-element comps the most. Repeatedly build a single anomaly type, damage reinforces itself, probably a weakness for the enemies you're fighting, and the bangboo will compliment the team's make-up, etc.
The stun window is also limited and where you'll be doing the majority of your damage. You want to stun, buff, and DPS in that order through the chain attacks and land on the DPS in most cases. There's variants of that pattern that either include specific units to boost the DPS or they remove one party member entirely to trigger the bangboo more often, but let's not get into that.
Disorder comps are also a feature of using one or more Anomaly units as the DPS instead of a DPS. The goal of a disorder team is to constantly proc individual anomalies that also pair well (this gets complicated). Not all of them work together (freeze notably doesn't).
Grace is very good at building electric anomaly, though she's slow to build energy and it takes a lot of field time for her to build up before she is able to start going. You don't want her in your stun window.
Soldier 11 needs to be on field to the maximum extent possible once she starts doing fire damage, and ideally the full duration of the stun window.
If you still want to use that comp, you would want to spend a lot more time with Grace on field at first, switching back and forth with Koleda to start to accumulate daze, have Grace trigger Shock (full electric anomaly) with her stacked EX attack, back to Koleda to trigger the stun (though which one starts the rainbow stun and which one triggers the chain attack matters less), switch through them during the chain attack to land on Soldier 11 and have her DPS through the stun window which would trigger a disorder at some point, but potentially not as reliably as you want before the shock duration ends.
It doesn't really have a great flow...