Tab Targetting Tips and Tricks

[Encroaching Death]

So I essentially just died in Howling Stones and probably wouldn't have if I was halfway decent at targetting mobs.

Right now, I have my Tab key bound to 'target nearest', I think.

Is there an option to bind Tab to 'cycle through targets' or something?

What I was doing was sending a charmed pet into a room of 4 mobs, then backing him out while rooting the others. As you can imagine, targetting the mobs quickly while rooting them is paramount.

What would you recommend for targetting in that scenario?