I'm new to this as well but its sounds as if your making things hard for your self.

The easiest thing if your just running 2 accounts is to have them the same Class, It will make things a lot easier. Once you got you keyboard linked to both games you should be able to set up one of your accounts just to copy the other. on you second account unbind the walk keys (you can bind them to number pad if you want) and have one button set to follow and assist you first account. Use number keys to cast you spells, and now you should be able to play one account and have the other one running behind you copying what you do.