Default [Q] Revert back to CM10.2 from CM11?

The CM installer install in my phone CM11, I like it but the battery life is bad :S, the last M6 had a lot of crashes and some weird bugs, now I want to install CM10.2 but I would like to know if just installing the rom is enough or if I have to do some step more

I want to do this:
*Install CM10.2 from recovery
*Wipe SYSTEM, CACHE, DALVIK and also DATA