Did it this weekend with 25th warden. BUT needed a 50+ friend to agro the woodtrolls. Once they were gone it was a run in the park. Oh, and yes there is an induction timer.

Not sure why they screw woodworkers like this. This is my 4th crafting class to GM and the only one I couldn't solo. Weaponsmith/tailor/scholar, all had components that needed to be retrieved from T4/T5 areas but I got them all without anyone else running interference and all at 25th level, one hunter and the other loremaster.

Now I used my sylvan stealth to get me to the path to eregion but could not get in to the area that had the heartwood. There was a woodtroll on each side and one roamer in the middle, but he never got far enough away that he or his buddies didn't detect me. And them woodtrolls were tough, had a 55+ hunter assist me and one on one got himself killed. But if you have a friend who is 50+ just have them hit a few and move away you can slip in there.