The IOD glabrezu takes me ~30 seconds. This is my go-to dps check for builds, as it has sufficient hit points to average out dps but not so many that it's tedious, is always there, and drops useful stuff anyway.
...but the worm takes ~2:30-3:00 per run solo. Yes, I've timed that because I'm a huge nerd. I'm not min/maxed for DPS but this is fairly past lived/geared up though.
Keep in mind dungeon scaling is VERY much a thing here, it had 2.8m-3m hp solo but has closer to about 4.5-5m with a group of 6. This WILL change if you are soloing and someone steps in, by the way, so if using bots to loot step them in after I guess.
It'll also hit MUCH, MUCH harder with a group, solo I can afk and read/work then just push myself back into combat when I hear myself not hitting, just standing in the circles and relying on consecrate. 2-3 people I can't do that, I have to hit renew every so often, and 4-5 people I get out of the circles. Full party, they'll probably kill most anyone not specced to tank.
If anyone is on Cannith feel free to hit me up for some worm slaying, MD is a tough grind and good company makes it go faster.