For Pike, rods in the 8-10wt range work well. Not so much because the fish are big but more so for the big flies you'll be chucking. For lines, the big 3 (Rio, Cortland & SA) all have great pike lines making chucking those big flies even easier. As far as a pike leader, everyone has their own opinion on this one. My favorite is 4ft of 20 or 30lb mono attached to the fly line and then three feet of Rio's wire tippet to the fly.
Now for Walleye, different game all together. 5-7wt rods. Floating lines with 2X or3X long tapered Fluoro leaders or sinking lines stripped up drop offs. Leech & bait pattern flies work awesome (search Popsicle leech). The trick here is not depend so much on the feel of a strike but the visual clues. Watch the slack in your fly line while stripping it in. As you strip in, the line will tighten then go slack. If after your strip it remains taut, set the hook. If after a strip it then goes taut, set the hook. Biggest mistake I see with guys going after Walleye is worrying about hooking into a pike and using the wrong tackle. You may loose a few flies to pike throughout the day but when targeting Eyes, use the appropriated gear.
Here's some links that may help out.
Video: Pike On The Fly
Article: Got Pike?
Podcast: Stillwater Fly Fishing With Expert Phil Rowley
Cheers,
Doc