I have a multi caster team and what most people do is have a single dps button setup that uses either /castsequence or the /click method to dps.

I personally use the /click method and it works great. I used the macros in the Wiki for /click and tailored them to my needs.

I have various utility talents on their own buttons (innervate for example).

so I spam the "1" key for my guys to dps, which is also tied to my 969 prot paladin tanking macro.