Nice to have you back.
For the bench, I'd do all reps paused if you don't already.
Your plan with 3x3@85% and 5x5@70% sounds good, but consider increasing your current pressing volume through more accessory movements.
Accessory movements that are closer to the main lift will also have a higher grade of carryover. Ex: Bench press with 2sec pause on pins at chest level will have a higher carryover to your regular bench press than incline dumbbell bench press. So, chose a varity of accessory movements, both specific and non-specific, that target different muscles that work in the bench press (chest, triceps, shoulders), different ROM and do these for slightly higher volume than your main work with the regular bench press.
Examples of accessory movements for the bench press that complement each other:
- Pin Press: specific, CNS-intensive, target bottom end ROM, lower reps 3-5
- Incline Barbell Bench Press: Specific, target shoulders and triceps, medium reps 3-8
- Decline Bench Press: Specific, target chest, medium reps 3-5
- CGBP: Specific, target the triceps, lower reps 3-8
- OHP: somewhat specific, target shoulders and triceps, medium reps 3-8
- Dumbbell Bench: somewhat specific, target shoulders and chest, higher reps 6-10
- DB flyes: Non-specific, target chest, higher reps 6-10
- Dips: Non-specific, target chest, shoulders and triceps, higher reps 6-10
- Tricep Pushdown: Non-specific, target triceps, higher reps 8-20+
- Lying Tricep Extensions behind the head: Non-specific, target triceps, higher reps 8-12
That has worked well for me.
Also, don't neglect work for the back, both the rear delts and lats. I like face pulls, band pull aparts and reverse DB flyes for the rear delts. For the lats I do Bench Rows (lying face down on a bench, row a barbell from underneath up until it hits the bench) and regular Bent Over Rows. The reason I do specifically those are that they mirror the bench press in ROM, the bar and grip. I think a Bench Row with the same grip width will carry over more to your Bench Press than DB rows.