The rest of my cross bar is filled out by Keen Fury, Leg Sweep, Invigorate, Second Wind, and Potions.

This rotation works great for me. I push a button more than every 30 seconds I assure you. this method just allows me to keep everything on one cross bar instead of trying to flip through them. As far as lag and what not I dont know what kind of dial up you guys are running on but I have never had so much as a hiccup of lag while playing. My combos are never interrupted by "lag spikes" and AoE abilities are easy enough to avoid. So I also never see the issue with losing dps to failing combos, even if that did happen every now and then my macros are small so having to recast one or two abilities is not going to be game breaking.