U are getting close.

#1 - The follow distance issue is simply server lag and will always be present. You will get used to it very quickly and it wont bother you. Just gotta take wide turns sometimes to avoid getting alts stuck on things.

#2 Simultaneous spells.

1 - Pick a spell (lightning bolt for example)
2- put it on your spell bars (preferably in the same spot on both toons)
3- bind them both to the same key ( ie "2")
4 - Press "2" both toons should fire at the same time.
5 - Repeat as necessary for all desired spells and macros
6 - Pwn mobs

Hope that helps