I have a 65 burglar with a warrior soldier (rank 21, skills at 18 and training at 20). The burglar is (I feel) reasonably equipped. The burglar has morale of about 4,400.
I have just failed the final battle in the Chamber of Marzabul (solo) when Motsham (whatever it's name is) and then, of course, Wili died so fail. This was my first time in the skirmish form of 2.5.5. I didn't put down any banners prior to the fight though I had an assortment of whatever had been available. I wasn't quite sure of the sequencing of these last events and then there was no time to do it. The boss came in, the fight started, I saw its minions come in, then as I was trying to fight, I was gone.
Obviously, I didn't do things, even things I might otherwise do in normal play. When things get hectic, I tend to forget or get pre-occupied.
The prior fights in the skirmish were not a big problem. I had a couple encounters that I did though one was one I had thought I'd avoid if at all possible. It was this last mainline fight that got me and I was kind of expecting trouble -- a friend tried it solo and got to the same point then was defeated and failed, he had a LM. fyi, He had set the skirmish 2 levels lower and I had set it 3 or 4 levels lower because of his experience.
I would appreciate if players who took a solo burglar through the skirmish could make some hints and suggestions about what I should have done or could try (everyone's playstyle may not compatible). Even some hints and tips about how to survive in the presence of or to deal with such a mob would help since that would help me know what to look for in my burglar.