Is there any useful DD rom for this phone? topic

My wife has a razr M running FXZ 182. I've de-bloated it as much as possible and it still runs like garbage. Her phone will randomly reboot throughout the day, sometimes it won't answer calls, when she charges it it gets very hot, the camera sometimes crashes too. Overall it's a pretty terrible phone. She really wants a Nexus 5 like I have but we can't afford it right now.

Are there any daily driver roms that just work, I don't care about fancy features or even latest android (although it would be nice). She just needs something that doesn't rape the battery, will snap a photo once and a while and take/make calls.