You could probably emulate the various Energy powers that a Psion gets for the elemental powers, and then have more specific powers associated with specific elements. For instance, at first level:
Energy Touch [Elemental]
Level: 1st
Cost: 5 BP
Action: Standard
Range: 30 ft + 5 ft/2 Breaker levels
Target: One creature
Duration: Instantaneous
Saving Throw: No
Effect: Choose one element damage type (Acid, Cold, Electric, Fire, or Sonic), and make a ranged touch attack against one target within range. If you hit, that creature takes 1d6 damage of the chosen type per two Breaker levels you possess, minimum 1d6.
Freezing Finger [Elemental, Cold]
Level: 1st
Cost: 5 BP
Action: Attack action
Range: Melee
Target: One creature
Duration: 1 round/Breaker level
Saving Throw: Fortitude
Effect: As an attack action (which can be combined with a full attack), make a touch attack against one target within melee range. If you hit, that target takes 1d8 Cold damage per four Breaker levels you possess (minimum 1d8), and must make a Fortitude save or become Fatigued, as the condition.
Burning Strike [Keywords]
Level: 1st
Cost: 5 BP
Action: Attack action
Range: Melee
Target: One creature
Duration: 1 round/Breaker level
Saving Throw: Reflex
Effect: As an attack action (which can be combined with a full attack), make a touch attack against one target within melee range. If you hit, that target takes 1d8 Fire damage per four Breaker levels you possess (minimum 1d8), and they must make a Reflex save or become Shaken, as the condition. This is a fear effect which stacks with other fear effects.
I could go on, but presumably you have the idea and stuff...
Also, how are the saves for the Limit Breaks calculated? There is no listed DC for anything...