35 is young. Very young. You haven't even lived half your life yet. I am 60 and laugh out loud when people say "at your age" to 30 and 40 year olds. Our life expectancy is 70-80-90 years. Does anyone really think you can't excel as you age? For motivation look up Sly Stallone in the gym on youtube. The guy is an animal and far from unique. Lots of 60+ 70+ lifters and athletes. The kids will learn this as they age.
I have used steroids to support a similar shift for me: as a bodybuilder and now I focus purely on athletic performance.
For powerlifting, among other things, you'll want power, speed, and durability.
Nothing beats Tren AQ (base) for on demand power. I have gone through periods where I burst my strength gains and knock down barriers with 10-20 Tren AQ daily. You will be an absolute tank in the gym but by the afternoon you'll have no sides whatsoever.
Yes, Superdrol would work but personally I would never touch it. Not even in my younger (40s) days when I was trying some really crazy stuff.
For on demand strength I would consider test base, tren (as described), and either winstrol, anavar, or tbol with the heaviest daily dose being between 30-90 minutes before the start of lifting. Winstrol is my favorite of the three because it gives power, promotes collagen synthesis to supports joints, and is a strong diuretic to keep excess water )and high blood pressure) at bay. You just need to hydrate thoroughly with Winstrol to avoid the painful joints people blame on winny but is actually caused by dehydration.
Wish the best of success in your directional change.