I think that a great new addition to Dark Elixer troops would be Witches. Witches would be similar to Wizards, but with more health and they would be a flying unit. Stats for a level 1 witch would be:
45 Dark Elixir to train
120 Hitpoints
4 Housing Space
10 minute training time
60 Damage per Shot
20 Movement Speed
3 Square Range
Attack Type= Area Splash