After doing almost all exclusively melee in the last month and a half, I think its going to be hard for me to go back to the caster lifestyle. I'm used to rushing in on the pallies, stealthing around on the 2x feral druids, and rogues, I think its gonna be hard to break those habits lol.
But yeah, I use the /focus leader system, and /assist focus /follow focus are on almost all of my macros. Only time I get a runaway (about 1x every 2 weeks) is when I just stop mashing the attack button in the middle or right at the end of a fight.