Go for a max single, drop 10kg and do 2 doubles. I only do this for FS. Haven't BS in ages. I'm going to BS once at the end of my sessions and see how it goes.
Don't do 5's man. You want to push up your 1RM. Maybe do 3's but no more then 3's.
I FS at the start and at the end of my sessions. You don't need much volume per session if you squat 8-9x a week as well as lifting.
You won't be able to hit a new PB every session...
95% good session!
< 90% sub par
You want to be able to be in the 90-94% range at the very minimum and get a few in the 95% rep rage and you'll have an immense day and hit a new PB