Thank you both for ideas pertaining to this. I'm very new to multi-boxing and keyclone, so I thank you for all your advice. I had decided against using [target=focustarget] for a couple of reason:
Firstly, I didn't want to have to make a macro for every attack to do that (I'm probably missing something simple).
Secondly, I wanted the flexibility to have a non-leader toon begin attacking a possible adding Mob. (Once again, most likely my rookie thoughts and I'm missing the bigger picture)