Hybred Psionic classes can be neat.
I've posted my idea for an Ardent/Blackguard here before. It has tons of flexiblity, between augmenting your 2 ardent at atwills, using fickle servant and domain feats to turn Virteous strike into a template for essentially atwill three or four powers at-wills, two uses of dread smite encounter power which can be combined with any of the above, plus one ardent daily power and two Paladin daily powers, plus getting to use the Blackguard striker features most of the time and the mantle of elation while in plate. Of plus the best of Paladin and Ardent utilities, changelings trick 1/ent and disguise atwill. Maybe a skill power via feat too.
For example you could have atwill Falling Sky three levels of augmentation, Revealing Strike three levels of augmentation, Virteous strike sun, Virteous Love, Virteous Sea, Virteous Arcane. Then dump Dread smite on your pick for cewl combos. That just without taking chameleon.
See psionic stuff can be nifty.