Help please (Masteries)

So I just finished grinding after like a month for 1100 units since I’m free to play and unlocked despair (I think it’s called, the first one for 2 carb cores) and I thought the paths after that were free or perhaps only deep wounds and assassin would cost, but it turns out they are 1 card and 2 stone cores each (which is what, around 800 units?) so my question is for all of you as a free to play player with little time to grind, do I save units and focus unlocking these masteries hoping they will help me with uncollected, or do I just YOLO and go for uncollected without them? If need be I can post my roster. I also debate on buying glass canon
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However, neither is necessary for uncollected if your roster is good and skills are up to snuff. If you think that can make it, I always advise becoming uncollected ASAP.
Thank you. I guess I’ll start hoarding units. I’ve sort of come to a standstill in 5.1.5 though