random reboots topic

I have tried countless roms from 44s, cm11, slimbean and even the new lollipop builds.
They all have random reboot problems. 44s by far is the worst.

Here is a log cat from mahdi 2.9 fresh install :
http://pastebin.com/aAiGh2An
rebooted an hour later
What do i look for in these logcats to determine the culprit?