Normally, you only stabilize (add sorbate) to wines that you will be sweetening. Since you won't be sweetening this wine, you wouldn't add sorbate anyway.
If you were sweetening the wine, you could add sorbate along with sulfites, when MLF is completely done. You just don't want to add sorbate before/while MLF is going on.
You probably won't even need to degas this wine, just let it degas on its own with some time and it should degas naturally. I'd just sulfite at the next racking, and then again at bottling.
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