I use JellyKat v.5 and have no problems like that. And do use nothing. Only clean install. Bu time to time I think I face this problem with my Note3 with stck ROM. What ever...
Try to use DVFS Disabler. Its an Xposed module. Maybe this module will help you. I'm really verry happy with JellyKat v5. Great Battery performance and no FC's and fast.
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