Toughness
Well how I run might not work for you since I run wvw/dungeons with the same people but I run 0/0/30/30/10 that being a full tank/shout heal build. in full arah knight gear with Dwayne ruins and cleric off pieces putting me at 2.1k toughness 3.3k armor. Doesn’t really matter what dungeon we do I can face tank 90% of bosses and unless I get focused by a kitten ton ofpeople I usually won’t die in wvw either.