Stone Vigil is a bit of a jump in the damage output from trash. Back near launch when everyone was in questing whites (and I was still shaking out the healer/mmo cobwebs and getting a grasp on SCH) my first group wiped on the first trash pull, lol.
If you continue to have major issues, look at your gear and the tank's gear. If it's all whites/severely underleveled that may explain where some of the difficulty is coming from. If it makes you feel better the trash doesn't hit as hard in the next dungeon, heh.
The dragon aevis enemies have an instant move called lunge they often do around 5 seconds into a pull for some nasty burst (particularly when it's more than one of them) so be prepared for that. The Ice sprites just hurt in general.
If your tank isn't popping a CD at the start of a large trash pull it'll just make things harder as well. If they aren't dodging stuff that can be dodged (stands in the bad), you'll also have issues.
