Intermediate Body Building Guide Tweak

So currently I'm doing the intermediate body building guide. I am interested in both body building and strength training, and I've been making some good gains both strength-wise as well as physique-wise, so I'd like to stick to it.

However, on the main power lifts (bench, deads, and squats), I'd like to put it into a strength driven format. I know everybody on here stresses lifting heavy, and I've noticed in a lot of the journals that people will do like 6 sets with low reps and high weight. So yesterday, for bench, I did something like this:

10 Pushups to get the blood flowing

185 x 6

205 x 3

215 x 3

225 x 3

245 x 6

But frankly I don't know what the hell I'm doing, so any advice would be appreciated in terms of how to ramp up. I used to do 3 sets of 215 x 8 (although i could usually only get 6 or 7 by the last set), but I plateaued there for a while, so I figured lifting heavier would probably help. I put the intermediate weightlifting routine below.

Monday: Chest and triceps

Incline dumbbell press 3 x 8-12

Flat barbell press 3 x 8-12

Pec flye machine 3 x 12

Lying EZ-bar extensions 3 x 12

Weighted dip 3 x 8-12

Rope cable pushdown 3 x 12

Tuesday: Back

Chin-up 3 x 8-12

Deadlift 3 x 8-12

Lat pulldown 3 x 12

Barbell row 3 x 8-12

Seated cable row 3 x 12

Thursday: Legs and calves

Squat 4 x 8-12

Leg press 3 x 12-20

Lying leg curl 4 x 12

Stiff-leg deadlift 4 x 12

Leg extension 3 x 12-15

Standing calf raise 3 x 10-12

Seated calf raise 2 x 20

Friday: Shoulders and biceps

Seated dumbbell press 4 x 8-12

Lateral raise 4 x 10-12

Rear lateral raise 4 x 10-12

Barbell curl 3 x 10-12

Preacher curl 3 x 10-12

Hammer dumbbell curl 3 x 10-12