Cost of spells is not a factor for me
I appreciate the advise to use lightning instead of rage, but I don't care if rage is expensive.
Ever since I have gotten rage I haven't been using lightning whatsoever. For war or even farming.
But now that I'm trying to raid for dark elixir I realized I can just lightning (level 4 lit) the dark elixir storage 3 times in a row and basically wipe it out.
I like using rage for dragons because it speeds them up. So I use it right away to ensure that all 10 drags get raged up.
Yeah heal seems kinda ineffective, esp since you only heal a few drags in all likelihood.