I would personally recommend CyanogenMod 11.0 which is CM Kitkat. Kitkat had best performance and balance.Better than nothing, at least I'll get a working device for the time being, thanks for the support, also, former Fluorescent Feather ROM guy here (the best and most lightweight yet) would you recommend me AOKP KitKat or Legacy CyanogenMod 13.0 ?
The one you find being the best for a mango.
I have no idea about AOKP.