First use BOSS to sort your load order then see if you crash. If you do, I suggest you turn off the lower half of your mods then play, if you still crash , re-enable them and disbale the upper half of your mods except for Dawnguard, Hearthfire, and the original HQ Texture Packs. You probably shouldn't crash now. Then re-enable only half of of your disabled upper half mods and see if you crash and so on until you find which mod is causing the crash. This is a quick way to do it. A betterway would be to disable mods one by one and see what causes the CTD, but that needs a lot of time.