Erestor is one of my favorite allies, and a good one too. Four resources in leadership shouldn't be hard to stomach, and Erestor fills one of his home sphere's weaknesses: card draw. Suddenly, all of those dead copies of Steward, Stone, StwB, or whatever are accelerating your hand; all while you're getting an extra two willpower and a sizable hit-point pool. Elven Light and Galdor ally add to the madness.