Hey there, this is my first post here and I’m actually about to create my first thread with a different question and have never been on 531 before so take what I say with a pinch of salt as it may not be relevant to you.
I should start by saying I squat twice a week on top of this. I switched from deadlifts to trap bar deadlifts (once a week) just over a month ago and despite maxing out all of those sessions I still felt awesome the next day and felt that if I wanted too I could have done a whole bunch of back-off sets. I opted for doing RDLs on a second deadlift day instead to make up for the little less hamstring/glute/posterior chain action and was having great progress (DL went up every week). With that said I thought I could be missing out on some potential trap bar gains by not doing any higher rep sets so the past 2 weeks i’ve done 3x10 trap bar deadlifts on my second deadlift day. I did feel maybe a little weaker in my squat which I didn’t feel when I was doing the RDLs and I would put that down to the extra quad activation in the trap bar deads.
I’m going to continue with trap bar deads 2x a week for a couple more weeks but I’m actually thinking that keeping the RDLs there may be more balanced and repping out a couple of higher rep sets on the same day as the heavy ones might be the best way to attack it. I’m sure i won’t go quite as heavy as I might if there was a second dedicated day but I believe it’ll be a quick and easy way to get a little extra volume in (and I guess not terribly dissimilar to when people do 5/3/1 BBB with the same lift on the same day).
You’re probably a lot stronger than me so your experiences may be different but all I can really say is I love the trap bar deadlift.