Well, the only flaw in using party1 is that you really have to switch leadership to one of your other toons once the party leader dies.
I'd still use focus, since passing leadership isn't a good idea, especially when you're PvPing.
Focus so far was very helpful, but sometimes I keep forgetting to hit the very first macro, to set the focus, when I invite my five Shammies :P
That caused a few wipes already, and I was wondering why the heck my clones wouldn't cast... <No target, dammit!> :cursing:

My Macros look like these:

Main Macro for saving focus on all characters:
(everyone has as many macros of this as you have toons, with different names..)

Code:
/focus <name>
/follow focus


DMG Spell for all toons:

Code:
#showtooltip
 /cast [target=focustarget] <Harm Spell>


Healing Spell for everyone:

Code:
#showtooltip
/cast [target=focustargettarget, exists, nodead] [target=target, exists, nodead] [target=player] <Healing Spell>; [target=target, exists, dead] <Rez Spell>



Quote Originally Posted by Ozbert
Well yes, but hardcoding character names into macros isn't very flexible.
Well, since you already know your toons and are most likely not going to change your group, you should use names in Macros, unless you tend change the names of your characters every now and then...
And this should even work in raids, where your toons aren't in the same group.