[Question] Is there any universal guide?
http://www.guildwars2guru.com/topic/84416-guide-minmax-dungeon-groups-with-any-class-composition/
The builds here are very old and out of date, but the basic principles are solid.
Go to http://gw2dungeons.net/ too. That website is a goldmine for starters.
Frór (yes, with the accent!)