I have 4WS team at 60. 1 warrior is fury and has all the best gear you can buy, cloudkeeper, arcanite reaper, lionshearth helm. Then I have the other 3 which are average dungeon geared and arms specced. Anyway... I often have a look on the overall damage meters and usually the 2 arms warriors with axes (they are all orcs) are top damage, then come the other 2. Last arms warrior is using a sword and has sword spec talents. Even at equal level dungeons the weapon skill seems to matter.

That LBRS clear video is mine, you can suggest me if you want to see somwthing specific. I need quite a few items from strat UD and I plan to do it this week and after that start farming either DM W or DM N tribute. I've also been doing UBRS, my 4 warriors and shaman + another healer, one tank and some dps. We have needed to kite drakk so rogue/mage/hunter is best.