I cannot get into the mine, nor sneaking nor fighting. I triedi using the three trinkets (Demon Hunters' Potion, Essence of the Holy Land, Zem Medallion) on one guardian skeleton at a time, or the three on one skeleton, but I either get aggroed by the resting ones, or get one- or two-shotted by the one I'm engaging. Besides, I cannot really understand what they do, and if they have any effect (well, one clearly immobilizes the target). I'm a Scout, and still can't sneak past while camouflaged, because the skeletons see right through my disguise.
The funniest thing is that the first time that I got into the mines to meet the NPC of the main quest, I carelessly run into it on automove, and nobody aggroed me. I cannot understand what happened.
So far I've spent more than an hour dying again and again. Any suggestions?