You have to consider too how you will set it up. In Gen IV it was easy: Smeargle stopped Taunt and frustrated wide-hit spam (like double-Surf) with Fake Out, Taunt'd Imprison, and stopped everything else with Follow Me. In Gen V, with Fake Out and Follow Me having the same priority, with new moves like Quick Guard and Wide Guard, and with priority Taunt and Encore, it all gets muddled together. Also, while it's easy enough to just pack a Fake Out user or a Follow Me user or something in tandem with the Gravity/whatever-user, you have to consider whether that Pokemon will be of any use after the effect is in place. A turn of switching is very, very crucial in Doubles, and if your opponent suspects you of switching X Pokemon out for Y, he'll get the upper hand very quickly. (continued above)