How many big pike are there? Your probably only talking about a handful of those fish in a 5 acre pond, but even so most likely it will take awhile to catch em all out even if you wanted them gone tomorrow. Your gonna need to find an awesome taxidermist because there are not many people in America that can say they caught a 40" northern from their very own pond.

I dont think you will have a problem with pike getting out of control and stunting in your body of water. If for some odd reason they happen to pull off a spawn, your panfish will actually wreak havoc on the baby pike and the stick will wreak havoc on any pike that happens to make it past the 'pond panfish' slaughterfest. If your pond was such that no one would fish it for a couple years than it might be a different story, but regularly spending time on the water and you can keep the baby pikes in check. (if for some reason there would happen to be)