thats why I said you need to test appropriately
If you run a single cdm run then you run on a single disk object that is usually present on 2 of the hosts only, one active write and one copy.
You can try to set up a policy which stripes all writes to more drives
But keep in mind that you apply FTT rules as well so you need to see whats an acceptable /working ratio is for you.
I did not have much success with striped writes, but that might be my use case again.