I'd suggest respecing for your boost sessions. A moonkins starfall & typhoon has to be much quicker and more mana efficient than moonfire on every mob.

For SM Cath, just have your guys stay where they zone in. Stealth to the cathedral doors (don't open yet), throw some HoTs on yourself, and start body pulling everything you see. You can easily keep yourself up with HoTs and switching back to moonkin form. Do not put on thorns as many will die before they're in range of your lowbies. Once you have pretty much everyone in the zone, drag them back to the hallway to break LOS, and AoE them all (usually requires 2 typhoons and a starfall... I pop out the treants to pick up stragglers).

Since you need to wait three minutes for your cooldowns, loot the bodies and heal up. I used this time to disenchant with my lowbies. Note that your lowbies still haven't moved from their starting spot (except to loot) and once done looting will return to the same starting spot.

Next, go to the Cathedral and pull the boss. Sprint back to the hallway and wait for the masses to come. Starfall/typhoon/treants and you've just cleared the instance in two pulls.

You can easily do this w/in 10 minutes and your lowbies are never in danger of dying. If I ever hit the "too many instances" then I spend time doing my enchanting & tradeskills with the mats I just collected.