Don't know if this is the problem, but maybe give the game some more ram to use.
Those settings can be found under Launcher Options -> Java Settings -> Memory.
xreliquary{1.2} [Reliquary] (Reliquary-1.2.200.jar) Unloaded->Constructed->Errored
I found this in your crash report.
To fix it all you have to do is delete the mod Reliquary or update it to a dev version.