why not do 3x5 for compounds and then higher reps for smaller lifts.
Like squat 3x5 then leg press in 8-15 rep range
Bench 3x5 then DB incline in 8-15 rep range
..etc
That's what I do, its works well. get a nice balance of hypertrophy plus strength.
Remember, for size, you need volume (unless you are doing DC training but thats another story)