Trolman, your plan is like allways suicidal. I don't understand how such a berserk as yuo be an Emperor. I say that 2 people will go to Capital to kill Gwonman, but those will have to look unsuspicious so they wouldn't be attacked when noticed, but could get inside the city and sabotage the defences and kill most of the rebel leaders, causing havoc. Other group and their best warriors will silently get near the city. When the assasin squad complete most of it objectives, it will give the other group some kinda like signal and will unreveal themselves and barricade in one of buildings and defend themselves while other group will attack through the breach in defence first group made, then it will save the group one from attackers, regroup and will attack the Palace.
Oh, and undeads... I have a plan... where's Ghost Thruster and another skelly guy? They might someway distract the undeads so we would win some time and would be able to prepare the defences.