Over 75% Success rate?

The percent win rate is for all your planeswalkers, not just the one you have selected.

I'm at 78.5%, and this is the deck I play the most:

Creatures
Consul's Lieutenant - First strike, Renown, and gives a +1/+1 to other attacking creatures you control.
Iroas's Champion - Double Strike
Lone Rider/It That Rides as One - First strike, Lifelink, and maybe Trample
War Oracle - Lifelink

Spell
Declaration in Stone - Removal
Smite the Monstrous - Removal

Support
Always Watching - Vigilance, and gives a +2/+2 to non token creatures you control.
Hixus, Prison Warden - Lock down on creatures which attack you.
Mirrorpool - Creature doubler...
Sword of the Animist - Gives first creature you control +2/+2, and destroys a 3x3 block of gems whenever it attacks.

Lone Rider/It That Rides as One is really the star here. Its all about getting out Always Watching, and/or Sword of the Animist, while pumping with Gideon's loyalty abilities.

The reason I like this one so much is that I can usually play game, after game, after game with it. The life gain bit Keeps you at, or near full health in nearly all Quick Battles (QB). Even if you are at half life, you can usually start another QB, and end that one at full health.

One thing I hope to pull is Campaign of Vengeance, which would combo nicely with Serene Steward.