Hi, congrats on your success.
This is what I would do.
I would not freeze precip until I have combined all pulls. Sure, the rapid crystal formation is cool and all, but the DMT is in there, it's not going anywhere.
Put your first pull in the dish, but put a lid on it, and you can keep it at room temp. while you add all of the rest of the pulls successively.
Then, once you have combined all your nps pulls, evaporate, with the lid off, and perhaps with a fan blowing over it, to evaporate down to 1/3rd or so of solvent.
THEN, freeze precip for 12-18 hours. You'll likely see the rapid crystal formation just the same, except you only have one dish, one wait time, and a hell of a collection jar at the end.
Rereading through your post - to answer how you proceed from here forward with THIS extraction...I'd recommend leaving your already freeze precipitated jar as is, but then combine all your other pulls, and evaporate to a 1/3rd, then freeze precip.