In for responses.
For the past 5 weeks I've been following TM on a 600-800/day deficit. No special macros or anything just alot of protein and a calorie deficit. I havent done any conditioning either and probably wont start for a few more weeks. 5s ran out really quick on me. 2 weeks in i was on 3s for all of the lifts, although 3s are still going strong for me (except on bench). I also went pretty quickly to 5 reps for 3 sets volume as well, I stick pretty strickly to 85% of Intensity day for volume. not sure what I'll try next maybe doubles then singles after 3s fail.
My brother is doing 1000-1200 a day deficit, he has alot more weight to lose than I do. His numbers are suffering terribly, 2 weeks in and he failed everything. Hes just repeating his volume days and intensity days trying to maintain strength. I think TM is to difficult of a program to run at that kind of deficit.
I think programming is more important than ever when you are trying to cut. I like your 4 day spit but I swear by recovery squats and would like to see those in there somewhere. I cant really comment other than that on program because I have changed things up several times to try and continue to spur progress. I started with a 4 day split like yours but I did volume squats on monday bench/press tuesday and the intensity days matching on thursday and friday. I did my recovery squats very very light on tuesday for 2 sets of 5. Im currently following the standard texas method template with no accessory work but chins on monday and friday.