I'm currently doing an upper/lower split but I had a question about lower body days. I want to incorporate squats into all of my lower body workouts. However, I was finding that if I squatted heavy every workout, then my deadlifts would suffer (I do them once per week). So I started doing deadlifts before squats on those days. Then my squats suffered, so I cut squats and deadlifts down to once per week. Now I'm finding that my squats aren't progressing as quick as I'd like ( I'm stalling again at once per week) and want to put them back in on deadlifts day. But I'm unsure of how to do that.

Should I do my regular heavy squat workout after deadlifts, knowing that they may suffer because I'll be tired from deadlifts, or should I do something else, like slightly higher reps with lower weight (3x8 instead if 3x5) so I still get the benefit of doing squats but without screwing up progress from my heavy days. Or does the rep range even matter as long as I'm going as heavy as I can on either? I've started doing the latter in the last two weeks and my squats haven't stalled since but that could be just a coincidence.

I'm definitely overthinking this somehow haha. I hope I didn't completely confuse everyone, but any help I could get would be wonderful.