Male muskellunge are extremely aggressive and territorial. Female, only during spawning phases, or when provoked. Safe to say, you can stalk up 4 females over the 3 males for the 9 acres, to keep the bass population at bay, or even reduced.
Muskellunge is an opportunistic predator. It will hunt for the most abundant, yet, when hungry, it will take on what's available in front of it. There's no specific feeding habit you can force it into, unless the entire reservoir is purely bass stocked. If you're hunting down the 4+ lbs bass, you may want to help the bass population reduction with fishing pressure. So, time to recruit anglers. Other than that, how about electro-fishing, or C4-fly fishing?
If you want to produce 4+ lbs bass, thinning out the smaller bass will promote just that.
