Easiest dungeon between AC/SF/HotW?
In my experience,
AC 1 & 2, and HotW paths 1 & 3 are all very easy; pugs should have no problems at all.
AC 3, SF path 3, and HotW path 2 are slightly harder, but still definitely completable by pugs.
SF 1 and 2 are much harder – I’ve yet to do 2, but I do know I wouldn’t try pugging path 1.
I’m guessing you mean SE instead of SF.
All paths of AC are very easy, I actually think 1/3 are easier than 2. Just bring an Elementalist with Ice Bow and you steamroll the burrow events.
All paths of HotW are also easy. 1/3 are the fastest, and 2 is the slowest. None are particularly hard. Just get ready for some long battles.
As for SE, path 3 is the easiest to do right now I think. Find at least one experienced person that knows how the path works, and it will be very simple. 1 has infinite waves of mobs, 2 has an over buffed last boss that hasn’t been fixed yet (if I recall, a dev said it was a bug).
http://youtube.com/user/Royblazer