never had any FPS issues with modpacks.
I am running game in SD mod with mod graphic enhance,all what could be on my is on max and I have constant 48-57 FPS on Jurassic Q9550+geforce 750 gtx and 8 gb ddr Ripjaws on 1066 mhz
Check your PSU.GPU or CPUI.
something is overheating.maybe even HDD is failing.
I had same situation with Star Trek Online.
Every time I jump in system fill with other players ship my PC reset.
Finally I made a last jump.my PSU died.
920M is not slow but like every laptop it share memory and mods use little more memory for WoT then standard WoT
I have 750 GTX on desktop and game with all mods what I need and graphic tweeks glide
on my PC,your mods working fine.just missing predator sight mod.
did not seen him long time.
it would be just fun with predator sixth sense and sixth sense predator sound