Ah yes good ol' cookie cutter groups. Places like SF where 5man teams w/ SS and MM i'm not gonna deny anything, they are the best tried and tested methods of clearing it if each member knows his role.
Things like your usual very boring '1 Stance Warrior, 1 Bonder, 1 Healer, 1 Prot, 3 Eles, 1 SS for FoW group' just suck though. They work? Yeah right they do, moment your bonder leaves your tank is stuffed. Warrior drops your almost royally buggered. An ele goes you won't notice a sodding thing becuase 1 is enough if they're good enough.
The only thing that bugs me is when you see Blood necros down there, blood is really crap in terms of FoW imo, of course this is probably because both times the morons didn't bring BR, why go blood and not bring that!?
Barrage/pet however, i've tried various methods for it like
6 R/x, 1 Healer, 1 MM (the lack of firepower sucked, specially when people left).
5 R/x, 1 Healer, 1 Order, 1 Stance warrior (i hate this set so much, all the warrior does is die).
5 R/x, 1 Healer, 1 Order, 1 MM (this works, it works well, and it clears FoW, why change anything?)
Course you can always change Healer for Boon prot, the best monk i've seen down there used a mix of heal and prot (guardian mainly i think) and kept even my necro alive.
Ring of Fire is a completely different matter. I see people around Thirsty River searching for SS necros and MMs (as if noobs even know what the 2 are). What the hell for? You don't need specific builds to get through missions at all, i managed it once with 3 Necros (1 at lvl8, other 2 around 15-18), my W/N, Orion and Alesia. Whats more amazing is no-one died and we didn't have an SS, the lvl8 was an MM but it didn't matter much

).
What about those 8-mesmer teams to UW? It may not be quite as fast as some other builds, but i can guarantee it'll be ALOT more amusing. I remember reading a thread somewhere around here that specified not using a 55 monk tank down there. Strange, this worked quite well:
55 monk w/ SB
SS/SV necro
Fire ele w/ Vengeance/Rebirth (mine)
2 Barragers w/ Rebirth (maybe Vengeance, never found out)
1 Ranger had to go at Twin Serpent Mountain, the other stayed back throughout the entire Chaos Planes while the 3 of us cleared it then helped for the Spawning Pools. After that it was a 3man team to clear the Bone Pits. Did every single quest down there except Four Horseman.
The trip went even faster than the 8-man trip a week or 2 earlier where 1 of the monks did jack shit (he was the worst bonder i've ever seen and kept casting SB on the warrior even when he wasn't under attack), another infuser kept randomly infusing the warrior tank when he didn't even need healing. Note it was the monks in this team that were bad, 1 of them was good, the other 2 seemed clueless.