You actually got the formatting spot on in the fact you provided a pastebin link. Most people just bring the error directly into the forums destroying formatting and bringing a wall of text.
As for you issue. You dont have sponge installed so its not a fault of sponge and therefore we are limited in what we can do.
Essentially a mod of yours is using mixins (made by sponge) and either a mod isnt playing nice with mixins or the mod with the mixins isnt using it right.
I cant tell you either mod, but I can show you one of my programs that detects what mod has mixins (sadly it cant work out what mods have issues with mixins).
Hopefully on the mixins website there is a list of issues or mod incompatibilities that has the other mod in and hopefully there is a way to get both working