Okay, it's clear by now that there is only one option.
Congratulations, you are a Jarl of the locally prominent Highbrows clan! Your mother gave you the name Golian, while you gained the name Duskbrow for your dark, brooding eyes which belie your lucky nature.
You spend some time reflecting on this luck as you peer at your band of rebels, a small force of 30 mostly untrained dwarves against the twenty-five that make up the fortress guard. You've already written the Overking for permission and you've propitiated the seven heretical gods who guard rebels, conspirators, and assassins if there's any other way to improve your chances, you can't think of it. Abystok has only rarely seen war in its sheltered location, and never since the late Low King conquered it, so the guards are hardly better than your followers anyway; still, it would be much better for the legitimacy of your rule if you can take power without too much bloodshed. Pursuant to that goal, your two trusted lieutenants have offered you a simple plan, and, since you're really only the leader by virtue of your birth, you should probably take it. The plan is thus: Your group will split into two squads, and the larger one will engage the fortress guard and hold them in their barracks while the smaller proceeds directly to the quarters of the Captain of the Guard, who now acts as the de facto thegn of Abystok, to kill him or force his surrender, as applicable.
The Captain of the Guard is a mean, scrawny man named Sogeljar, a lowly churl elevated to the station after the late Low King's numerous far-reaching campaigns sapped away what military talent Abystok had of which he certainly has little or none, having been trained only as a priest before misfortune pressed him into service. Unfortunately for you, his clan, the Half-Eyes, is one of the most numerous peasant clans in and around Abystok, and they may make trouble for you in the future; but there's little to be done about that. The only question for you, assuming you stick with your lieutenants' plan, is who will lead the squads:
A) I will lead the smaller squad myself, and my lieutenants will go pin down the fortress guard in the barracks.
B) Gostell, a brutishly strong farmer, will lead the smaller squad, while I and my other lieutenant, Nedru the silverware merchant, lead the larger.
C) Nedru leads the smaller, while Gostell and I lead the larger!
D) Gostell and Nedru can decide for themselves who leads what squad, I'm going to take a couple men and secure, uhh, the kitchens! Yes, that sounds safe important!
E) Something else, or maybe I don't like this plan at all! I'll suggest something different.