Sounds like a very solid team.

I spec my locks Destruction. You can check out the spec by looking up Vampirah on US Kil'Jaeden. My locks have two destro specs - one for more damage and +hit and one for replinishment. The rotation is a bit complex, but not too bad.

My hunters' DPS is very solid, though the macros are the most complex of any I've written. Some fights they end up at the top of the charts. That's running them Survival, so replinishment is automatic with that spec. Lack of gear competition, misdirect, and one more fun class to try to optimize are the main reasons I like having one in each group.

My boomkins are very hit-and-miss DPS-wise. This is because of the weird Eclipse proc, which I ignore. Basically just /castsequence Wrath, Wrath, Starfire besides the Insect Swarm and Moonfire attacks. One button spam for my tanks and all my DPS is all I use - way too much going on as a 10-boxer to try to manage Eclipse procs. So most of the time the Boomies are at the bottom of my DPS, though sometimes they get lucky and end up at the top. I really like having one boomkin for each of my 10-man teams since they give the +3% hit buff to the whole team. That's a TON of extra DPS I can get for instead of hit. However, Blizz has stated that this is going away in Cataclysm, hence my thought of possibly dropping my boomies for mages. One bright note is that Blizz also stated that they believe the Eclipse proc is responsible for way too much of their damage ATM and plan to reduce the effect of Eclipse timing in Cataclysm.

I'm in San Diego this week for work, so don't have access to WoW or macros. if you'd like me to send you my rotations, just hit me up next week.