Keelyn is hands down the most OP and broken leader in the game. If you disagree, I have 3 words for you. "Twincast summoner puppets." (Perp may or may not have summoner on any given turn; keelyn will always have it.) In addition, illusionists (such as, for example, Gibbon) don't pass illusionist onto their puppets, for even more brokenness.
That is all.
/S