ToJ? Pfft, I've tackled all of insane mode solo, save for the Necromancer battle because that is just too hard with the crappy orange night. Have made it through with a buddy on co-op, but didn't get credit for trophy, so still need that.
I am available to bring my lvl99 Orange Night, my ~50 Necromancer, or a slew of other toons. I think my red knight is in the 20s and has done a good bit of insane. I love this stupid game too much; so let me know when and I'll be there (after 8:30 central on week days, more flexible on weekends).
Edit (Pro-tip): For those who do not posess my vast amount of God-given Castle Crashers pwnage, consider running a character through the game putting points into nothing but speed. This will increase the speed and damage you do while using the bow for ultimate cheapness in insane mode. It'd make you a big help to the team and it's fun to lay down arrows so fast that they're practically touching each other. I can get you access to the cat pet meowburt (+3 speed) as well as the sai (+6 speed).