Well, if you're doing mostly stuff like 4x8 I would consider that mostly hypertrophy, not strength. Once you're finished with that stuff you could do a strength block with lower reps, using ranges like 3-5x3-5. Also, it would help a bit to specify whether that running vertical is off 1 leg or 2. If you're better at 1 leg jumping, or just want to improve it, in either the strength/power/peak block you should think about switching from ass to grass squats to half squats(just above parallel, not parallel). The half squat will be more specific to the knee angle used. You're fine with the ass to grass squats now though, since it's mostly(I'm guessing) hypertrophy. Half squats also help double leg jumps a lot too, obviously, if you look at adarqui.
Keep working at it, and be sure to read a lot about training so you can learn, which I'm sure you've done.
Also be sure to keep working upperbody, even if it's just pushups, pullups, and stuff.
I'm not a veteran on here, just giving some tips.
Edit: oops I forgot
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lol