I don't remember the last time lightning hit my DE store (except once or twice when my CC troops were nearby), I beleive it was somewhere when I was TH8, so a couple of months ago maybe? I've been to Masters 2, down to Crystal 3, and most recently hanging around 2300-2400 for a few weeks with my TH9. Maybe it's 'cause I maxed out my DE store early on as TH9? My TH is sometimes exposed for sniping? I'm lucky?
Personally I'd rather hit a full maxed out DE drill with lightning, the return on that tends to be much higher, although I only do that sometimes on a de farming raid that didn't quite work out 100%...

