So right now we have dark, fire, and ice flaks/turrets. Dragons all have elements. Just thinking it might add a level of difficulty if the dragon elements were weaker/stronger against the towers with opposite/same element.
Ice tower strong vs earth, wind
Weak vs fire
Fire tower strong vs ice
Weak vs dark
Dark tower strong vs Fire
Weak vs earth, wind
Just throwing it out there. Combos can be changed around