Thanks, i scavenged a few mako kernel and found something that was related to crash when reaching deep sleep. I've merged that in kernel. I also compiled the kernel with GCC 4.7.3 from codefirex (synergy).
No crashes yet and I have WIFI and GPS on. Will update if anything changes. I just left my phone alone for about 40 minutes, it would have crashed before if WIFI was on.