0Beechlgz

My modpacks tend to be heavy on the processing side, and I tend to counteract the lag with FPS+, Optifine and a few config tweaks. Try using FPS+ to increase the frames or look into some of your config settings. Also, looking over the mods you have installed, you have some pretty hefty processing mods like Local Weather and Storms, GregTech and the several mob-adding mods. Im not saying to remove them, but keep in mind that they can become memory hogs.

can you use opis to track the problem? wich chunk is consuming all the resources
there is a problem with ender io and other mod that spawn like one millon enderman in the nether

i didnt installed the pack but your problem are entitys (mobs)
Install mobcontrol or a mod to control the spawning of mobs.
And install fastcraft, also you have to enable fasth math, smooth world and maybe other things and disable other with optifine
There is no reason to have less than 50 fps with any modpack in a normal pc

works now.
 
nice collection of mods, except there's one I'm not too fond of; Gregtech