Anavar increases ATP synthesis and so creatine supplementation can only help with strength and gym energy. If you're planning to use creatine monohydrate then prepare to accept bloating. Also note that, despite most people saying to the contrary, some guys do bloat on var.
Var plus creatine is not a bad combo as oral-only cycles go and there is a noted synergy. Take some liver protection against the 17-AA and note that the var will trash your lipids. How that affects you is down to your own body.
You also don't mention how long you intend to run it.
There are literally hundred of threads on here about anavar. You might get some good mileage out of running a search. It's likely that someone has some results you can look at or you might find someone worth sending a PM to.