1 pally, 4x shaman.
have the shaman outside of the room and the pally inside the room fighting at the end of the hallway so the fight is mostly at max DPS range.
standard totems should be dropped in the center of the hallway.
(I haven't tried this but is sounds good ) move shaman back several feet and drop fire elementals, move shaman back forward then have tank pull.
( I normally have dropped the fire elementals after the shaman are attacked but I'm going to try the move back and drop next time )
you don't want the fire elementals attacking the boss, they are to keep your shaman free of snakes.
be ready to drop poison cleansing totem more than once and a possibly group chain heal.

tank and spank.