I have found volume to work well also. I am a decent bencher for an old guy at 48 - I can still do 405 pretty easy at 212 bwt, natural and raw
I have found rotating exercises like floor presses, dead presses, cambered bar presses and board presses - 2-3 boards have helped me a lot to gain and lately maintain
One day I do 3 -5 sets with reps in the 3-5 range @ 80 % of 1 RM ( Sunday), ( Wed) I will do some lighter work -say dead presses in the 70 % range for 6 -10 singles with 1 min breaks between singles, (Fri) I will do 3-5 sets @ 60% range for 6-8 reps a set with 3 min breaks, just an easy workout
My other days I do squats -Mon, back/bi's on Tues, some deads on Thurs, I do hit tri's whenever I have the energy or desire during the week after I bench - usually heavy pushdowns or weighted dips
I have experimented with a lot of routines, and this is what works for me -staying in the gym a lot, but not for a lot of time each workout