Monxs ROM. I did think about greenify. So have removed it and even auto starts in fact I've tried turning them all off except titanium.
I do see the day out that's not an issue.
Sent from my C6903 using XDA Premium 4 mobile app
Since nobody else seems to be noticing this issue, I'm going to go out on a limb and say probably something to do with what you've done in the course of rooting and ROMs isn't playing nicely with your phone in particular. I'm unrooted running factory and haven't observed any notable difference in battery drain from games compared to my other devices. Phones I've used have been Nexus 5, HTC One, S4, Note 3, Moto X, G2 to list a few more recent models.