You can’t just benchpress/squat/deadlift the same all the time do you?
What you can change ? from 5 reps 85% 1RM to 3 with 90% 1RM? / add some bodybuilding exercises? / maybe just lift from 5-6 sets to 10 instead?
Are these good enough? how much should be the periodisation in powerlifting? (each 2-3 weeks ,monthly? 2 months?)