The first time I finished it in vet was with a random group, thankfully everyone knew mechanics. It isn't hard if you just follow the very basic mechanics.
First Boss
Easy peasy. Just stay away from the red aoes he shoots out.
Second Boss
Kill the Spirggans asap. You cannot out dps the tree without killing the healing spriggans.
Third Boss
Bash the wolf when she pounces on a player. Kill the shock wardens on priority.
Fourth Boss
Try to kill the fat wolves on priority. The boss summons different shapes and colors on top of his head. Whichever color he stops on, find a circle of that color and stand in it. Or you die. One player per circle.
Fifth Boss
Just burn.