Besseleth spawns in this spider filled area, it's the big orange spider and you can't miss it.

Oddly enough, she's spawned in rather random locations. I seem to recall her only spawning on the west side, but I found here on the northeast side in here this time. Weird.

Hearth back to Sun Rock Retreat

PROTIP: If you go on the far west side by the lake, there's a path that leads up into the mountains, then eventually back down into the Charred VAle, using this path to get down there saves a lot of time.

All three of these quests can be done over pretty much the entire vale. They will not, however, be easy at level 24. Be careful while doing this and try to avoid adds. You shouldn't have any problems whatsoever doing everything 1-on-1 though.

You want to be 15%(3 bars) from level 25 before you turn them in so you might have to grind a bit. Either way, when you're 15% and done with all three quests, return and turn them in and gather up follow ups. Once that's all taken care of, fly to Camp Taurajo in the Barrens and start circuit 6(Yellow plus sign)