This is waffle's brother speaking. i have done most of the things that you have told him to do to fix the modpack which were the following:
i got the config files for most of the mods
i got AnimationAPI
i got rid of the extra CodeChickenLib as you said
i got rid of optifine (i can live without it lol)
after i did this i came across a few mods that caused the game to crash upon launching (im assuming it has to do with ID conflicts, but i don't know how to fix them).
The mods that made the game crash were (i will list the file names):
DartCraft BETA 0.2.20v2
Galacticraft-MVJSUN-1.6.4-2.1.1
ICBM-1.4.2.386
Resonant-Engine-Development-1.2.0.266-universal
MattparksCore-1.6.4-2.1.1
OpenBlocks-1.2.9
openccsensors (i tried to find the version you specified but i could only find 1.6.4.5 and that made the game crash as well)
openeye-0.5-1.6.4
NotEnoughItems-1.6.4-1.6.1.9-universal
neiplugins-1.1.0.6
twilightforest-1.6.4-1.20.5
the mods above were the ones i could not get the config files for (obviously). and as for the CodeChickenCore and EnderStorage being out of date...i could only find mincraft version 1.7.10 of these mods (although i am still on the lookout for the correct versions) If you could help us out with us getting these last few mods on there i would be very appreciative, everything works so far except for the listed mods. I am doing my best to follow your directions/advice
also for the record i already have Universal Electricity in the modpack so i could use Resonant Engine and ICBM
*EDIT* i did not see the link on fixing ID conflicts until now, i will try to see if i can do it myself, but still, any advice from you would help as well
*EDIT 2* i forgot to mention im having trouble getting IC2 to run, and i dont know why.