My first play-through, we lost either Baurus or Jauffre during battle, maybe both. But one rings a truer bell. Lost a lot of other guards too.
Second time 'round we lost no more than two city guards. Bear in mind my avatar is a nord warrior and at the time sported full Divine Crusader equipment plus decent jewelry and decent stats for his level. The tactic he used was pretty basic. He'd position himself very near the gates. When one spewed mods he's rush them and aggro on all or as many as possible. He'd whack 'em a bit then lead them to one set of guards, who'd join the fray. Since the mobs were focused on my avatar the guards could whack away without themselves taking damage. By the time the mobs turned on the guards they (the mobs) were pretty softened up. In the meantime my avatar would reposition himself at the gates, attack the next batch of mobs as it emerged, then lead it to another group of guards. This procedure was repeated until the main Gate opened, at which point my avatar rushed through pronto.
The trick, I think, was in making sure only a portion of the guard were engaged at any one time. Seems to me their default formation naturally split the guards into thirds, but it's been a while. This of course assumes a full complement of help from Allies for Bruma.
It worked well, though I realize a non melee specialist would likely need alternatives.
-Decrepit-
Yup, exactly! I always made sure that I took the full agro in that battle. My character was always equipped with heavy daedric armor and daedric swords at that point. I usually did the Battle for Burma really late in the game, since I wanted to collect higher level sigil stones and I actually liked going into Oblivion Gates LOL
I could never accept that Jauffre would die and so I perfected my method with each play through. I would loose Baurus at times, but most of the time, following above method, we all would make it back to Cloud Ruler Temple.