Quote Originally Posted by Thatsssfuego View Post
Tab to select a target.
Can do.
Quote Originally Posted by Thatsssfuego View Post
Macro to tell second char to select the next target with both characters casting a dot.
Can do (just tab twice instead of once)
Quote Originally Posted by Thatsssfuego View Post
Second macro to tell both characters to target the NEXT target and only cast if that target is clean.
NOPE. Blizzard does not allow you to "detect" status/DOT effects on a target anymore.
Quote Originally Posted by Thatsssfuego View Post
The most complex version I can think of would be for every ranged character to select a mob and then began to auto attack with a wand or a bow.

Any advice would be greatly appreciated.
About the best you're gonna get along those lines would be to have the characters press tab a different number of times at the beginning. This is also somewhat iffy as tab-targeting only works if something is in your frontal arc of about 80 degrees or slightly less than what you can actually see on the screen. This is also impacted by whether you have toons looking in the exact same direction and the same camera angles/zoom.

You could possibly do something where you set up different focus targets on each toon before every fight and then have a step macro that would target+assist in order with everyone switching to the focus target of each slot in a rotation but that will again require some pre-fight setup -- it won't work for the "run into a spot and just start blowing up all the things" use case. It will also be pretty rough in terms of lag-target-swapping delays.