the only kind of switching I ever do from my normal rotation is the Cobra for the Kerblaster, Cobra only in my lobby because with the low bullet speed and slight lag in others' lobbies, its difficult to get criticals with.
and my normal rotation is as follows:
DP Unkempt Harold Impetuous Ravager (gotta love that reload speed on a 2 shot mag) Big Badaboom Tumtum Cobra (Wild KerBlaster)
A lying tongue hates those it crushes, but a flattering mouth works ruin. -- GT: Wretched Owls