Cribanox covered most of it, bards are much more capable soloers when they are allowed to utilize their ultimate tool: selos. I soloed my DE mask at 47 (ass/sup was a L30-35 camp on Live back in 2001), and I wrote up a guide about how to do it
here. LGuk is one of the closest quarters dungeons in the game, definitely tighter than KC or Seb.
In KC and seb, I've soloed the zone in mobs using alternating charm methods (charm one, dot second, when charm breaks charm second and dot first). Since charm clears aggro you can manage to keep your DoTed mob attacking your charmed pet if you alternate your charms. But this is difficult and I've had a lot less luck with it in Seb than KC. And it leaves little room for error.