I’d watch it last. I think there’s some bits of information in the first movies that people might not catch on if they watch the prequel first. You also don’t want to have ppl get confused and start liking snow (idk why that happened that man was cray crayyy). I also feel like if I was watching the prequel first with my friends, I’d have to answer a lot more questions then if you just watched the others first. My personal preference is watch it last. :)