Yeah, you should know XD I was so annoyed at the Harpy Wraith part, didn't know she was attacking me and went afk....happened 2 times :| *like a retard*
Well, it won't. Most world bosses get camped, or killed in less than 30 mins after spawn. Also, this quest is only for 150s and if any level 150 player sees an open world boss, he'll/she'll definitely form a squad for it, or at least tell someone about it.
how long does it takes to finish this quest chain?
Um......it takes about 3 hours or, maybe more if you go afk, etc. Just because you have to go ALL OVER the place. Definitely have Teleport Stones. lol