Themes and Multiclassing

Fighting Style, Rogue Scheme, Deity, Tradition of Wizardry

These all sound like themes to me. To deter level dipping, simply move all the frontload abilities into themes for each class.

Multiclass spellcasters get 1 spell slot per class level and 1 spell level per character level.
ex. Cleric 7/Wizard 3: 2, 2, 1, 1, 1 and 1, 1, 1, 0, 0

Once again, here is my recently updated version of maneuvers and classes. All at-will maneuvers, unique class features, and includes a Paladin and Ranger!