Now we are getting somewhere, that looks mighty fine
On the sheet is says 1RM and then 90% which original was the TM it has changed since then to 85% or your 5RM. But 90% is fine.
I would do that lets take Bench if you can get 5 good strong reps with 110 then you’re good.
After the first month you increase the TM by 5lb/2,5 kg
Now your TM would be 112,5 if you’re a kg guy
Next cycle you calculate new weights for the main work.
BBB sets are as you’ve written 5 sets of 10 reps with 55 kg.
Next month the BBB set will be 60% 112,5/100= 1,125 x 60 = 67,5 kg
last month the BBB sets will be 70% 115/100= 1,15 x 70= 80,5 kg (80)
Doing a 3 month challenge like this it is very good to look ahead if 5 sets of 10 reps with 80 kg seem very intimidating to the point of no chance I can to it, then it’s wise to dial back a little bit. If it looks like damn this is tough, but maybe I can then go ahead, it is a challenge so it should look almost not doable.
Assistance I would keep very very light and only chase a little pump, you’re looking at doing BBB AND triumvirate at the same time. It’s doable but it’s tough.
This is what I would do:
I would do chins 1 day and pull ups 1 day on lower body days supersetted with some abs like ab wheel 1 day and hanging leg raise 1 day
On upper body days I would do BB row 1 day and DB row 1 day + biceps and triceps and some face pulls both days.
No more than 3 sets and I wouldn’t do any more.
I am not sure I know what you mean the + means amrap on all 3 days.
I would do something else like triumvirate or FSL 5x5.
Do the challenge read up on the books find another wendler program there are a few laid out here on TN and in the books.
Good luck, if you really gets the fundamentals on the 531 approach then you can always fall back to the basics of this.