Sure. Let's say you enter everything above and have the system in place. Generally when I login, if I wasn't in immediate danger on where I would enter just a simple t. That would list out my previous targets. Lets say I see Venara on. I would enter t5 Venara. That would set my fifth target to Venara, but not my current target. I would then enter the command t5 by itself. That would set my current target to Venara. The thought process is that if I have 5 people on that are my enemies, I enter them into T1-T5 beforehand, then just switch whenever I see one close.
Basically, the aliases are just slightly different, the one that accepts a parm after (t1 *) is to set the target1, while the one that accepts no parm (t1) is to set the target to target1.