It really depends on how many battles per day you're doing. Some people only play as much as they have trooper hires. Others will try to not let a single energy go to waste (ie using energy before it refills to max). Others will only do a handful of battles per session.
We're all hands on deck to get an update out right now. Once that's submitted for review with Apple/Google, I'm sure we'll do another post for you guys talking about what's coming up. Stay tuned!