bit of info on your group would help, like lvl/spell power etc.

if your 80 you could do it with 5 shammys easy, hes the 2nd boss in there and they do go down really quick, his adds only have like 100k hp or something, with shammy aoe these now its easy to kill them all.

if you only need 1 enchant wouldnt you just be better off buyin a scroll of mongoose of the ah? upto you