I also have simular troubles for a pack i made that worked in 1.7.10, but after updatting mods on the twitch mod launcher: i got this error.
crash report: https://pastebin.com/aDMd6BP1
Modpack:
BiblioCraft[v1.11.7][MC1.7.10].jar
buildcraft-7.1.23.jar
Carpenter's Blocks v3.3.8.1 - MC 1.7.10.jar
Chisel-2.9.5.11.jar
CodeChickenCore-1.7.10-1.0.7.47-universal.jar
CoFHCore-[1.7.10]3.1.4-329.jar
CollectiveFramework-1.0.0-132.jar
ComputerCraft1.75.jar
CustomNPCs_1.7.10d(29oct17).jar
Decocraft-2.4.2_1.7.10.jar
Hats-4.0.1.jar
iChunUtil-4.2.3.jar
Industrial-Craft-2-Mod-Experimental-1.7.10.jar
k4lib-1.7.10-0.1.75-universal.jar
Lantern1.47[1.7.10].jar
Mantle-1.7.10-0.3.2b.jar
MapWriter-1.7.10-2.1.10.jar
MineFactoryReloaded-[1.7.10]2.8.2B1-201.jar
Morph-Beta-0.9.3.jar
NEIIntegration-MC1.7.10-1.1.2.jar
NotEnoughItems-1.7.10-1.0.5.120-universal.jar
IC2NuclearControl-2.4.3a.jar
OpenBlocks-1.7.10-1.6.jar
OpenModsLib-1.7.10-0.10.jar
Peripherals++-1.3.6.jar
1.7.10-Pistronics2-v0.6.4.jar
Player-API-Core-1.7.10.jar
PortalGun-4.0.0-beta-6-fix-1.jar
PowerConverters-1.7.10-2.11.jar
ProjectRed-1.7.10-4.7.0pre12.95-Base.jar
ProjectRed-1.7.10-4.7.0pre12.95-Compat.jar
ProjectRed-1.7.10-4.7.0pre12.95-Integration.jar
ProjectRed-1.7.10-4.7.0pre12.95-Lighting.jar
ProjectRed-1.7.10-4.7.0pre12.95-Mechanical.jar
ProjectRed-1.7.10-4.7.0pre12.95-World.jar
Railcraft-Mod-1.7.10.jar
secretroomsmod-1.7.10-4.7.1.413.jar
[1.7.10] SecurityCraft v1.8.12.jar
SmartMoving-1.7.10-15.6.jar
SmartRender-1.7.10-2.1.jar
Sync-4.0.1.jar
Thermal-Expansion-Mod-1.7.10.jar
Thermal-Foundation-Mod-1.7.10.jar
TiCTooltips-mc1.7.10-1.2.5.jar
TConstruct-1.7.10-1.8.8.jar
witchery-1.7.10-0.24.1.jar
worldedit-forge-mc1.7.10-6.1.1-dist.jar
Optifine is used to improve my laptop's performance by turning some settings down to prevent crashing