Problem i always have with last boss is that in phase 2 when he has 3 purple orbs above his head i have my slaves on follow and just run, jump as they land..This doesnt always work as sometimes i will lose 1 or 2 toons in a second, or all will have anout 10% health.

Looking at your vid you have them all spread out and as they land you just back peddle, couldnt really see much of your slaves