Focus Macros are for EVERYONE!

I've been going over the various uses of focus targets and macros with my arena team. I've come to the conclusion that it doesn't matter which class you are, there are going to be spells / abilities in your arsenal that you are saving for an off-target, aka the "focus".

I'll use our Warrior's newly added focus macro, but you can cater this to your class. I helped our Warrior set up a macro to help stop a healer from casting in an extreme situation, e.g. Counterspell is on cooldown. The macro is a simple one that will intercept your focus target while keeping the DPS target on your screen.

/cast [target=focus] Intercept

We rarely use this macro since I'm pretty spiffy with my Counterspells, but it has come in handy on occasion. If CS is on cooldown, and the healer is casting, then we'll have our Warrior hit this macro (without untargeting his DPS) to immediately intercept the healer and stop his cast, therefore allowing me to burst DPS the target to his death. This is a last resort since we also have the Paladin's HoJ stun.

I know there must be other uses for the ability to cast on a focus target, but as I mainly play a Mage, I can't elaborate on other uses. I'd like to see others' ideas for focus macros - for example, what is an ability that you reserve for an off-DPS target, such as a healer?