5/3/1 for Powerlifting for January Meet

I’ve been thinking of doing 5/3/1 for Powerlifting in preparation for my PL meet in the first week of Jan. 2019. I’m rounding out my third cycle of 5/3/1 this week, and I’ve made some good progress. However, I think 3/5/1 might do better with exposing me to some maximal singles before the meet, as I’ve been using an 85% TM and getting a LOT of reps on my + sets (at or upwards of 10 for Bench, DL, and Squat). I’ve also never trained with “heavy” singles (90-95% max, unfatigued), excluding Bench Press.

My current Rep Maxes are:

BW: 177

DL: 300 x 10
SQ: 255 x 12
Bench: 155 x 11
Press: 110 x 8 (not too worried about this for the upcoming meet).

Thanks for any advice you may have.