Part II...

Since the party will sort self, tank, DPS in a light party, then I use the same thing, but replace the 2 with a 3 for a Cure DPS1 and 2 with a 4 for Cure DPS2. I don't leave myself out. I have a Cure Self.

To that end, since I don't want to worry about what I have targeted at that moment, when I want to attack the tank's target, I have macros that look like this:

/macroicon "Stone"
/psort
/target <2>
/ac "Stone" <tt>

If I made a mistake on line 3, forgive me, I'm typing from memory. This targets the tank and attacks his target. Don't want to lose focus his target in case he switches targets for some reason, and I don't have to wonder if I'm on the right target. No matter what I'm doing, the macro gets me to the right place.