You'll need to climb; either run through the upper skeleton camp, bang a left and start climbing, or climb up from the below the skeletons toward the newbie area if they're not grey.
As of February 2025 Invisibility has a random chance to disappear instantly on its own as the timer gets lower. I believe it can only happens when the remaining timer is 6 minutes or less. (or is it *under* 6 minutes? I'm not sure). So you want to refresh it often whenever you're in a safe spot to do so.
Dragging corpses or looting chests (!!) won't break invisibility. Casting any spell will.
The current stats of this ring have changed unfortunately :) - 3 int, 15 mana, 18 spell crit rating. Btw, I imagine there are different rewards for classes, not just 2 versions. Can anyone confirm?
#2 coords r exactly right and you don't need a group. Solo on my 14 shammy. Just watch pathing and single pull 1 mob to clear. Go out the front gate of TF and take a right. Hug the wall right below skelly area until you get to a little nook with some trees and some bees. Climb up in the very corner. Had to kill a couple mobs on way up. Just keep climbing and heading right.