Two to four tiger muskie per acre, stocked at 12" each, would thin out all three species in a year or less. A recent article in Pond Boss recommended stocking pike or muskie in ponds in which bass are overcrowded. Tiger Muskie would probably be better in your area because the pike could potentially spawn, in which case they could become too numerous and overeat their welcome. But tiger muskie only live four to five years and are sterile so that's not a danger with them. I've stocked pike before to thin overpopulated sunfish, with great success. The best thing about this method is that as long as the pike/muskie are in the lake, they'll keep it balanced.

The fyke net would likely work a lot better than just angling. An eight-acre pond overpopulated with crappie would be very difficult to bring into balance by angling - roughly akin to trying to levee the Pacific Ocean with a beaver dam. I like the Esox option the best because it's kind of like those self-scrubbing oven cleaners: add the Esox and they do the rest.