It's honestly a pretty solid gear set. I'd like to see more haste (at the expense of crit, if possible) but that looks mostly like a symptom of having some old ToGC gear and an OK but not amazing cloth belt as opposed to "Ur doing it wrong." I'd take the
Sundial over that Chalice in a heartbeat, for example, but the Chalice was a hot item back in the day, and unless the Sundial drops that's a moot point. And please, for the love of god, don't give up Trauma for anything but a Heroic Trauma. That thing is ridiculous in the hands of a raid healing tree, so staves are right out.
As far as gemming goes, the general rule you'll hear at places like EJ and such is that trees shouldn't be trying to patch up holes in their gear with gemming at the high end. You just end up losing too much spell power and you won't even get enough haste/spirit/mp5/whatever to actually fix anything, particularly if you're skipping socket bonuses just to load up. So keep on gemming spell power and use whatever combo of SP+Haste/Int/Spir gems you have to in order to net good socket bonuses. If you really need to change your performance from fight to fight, you should try getting your hands on a few game changing trinkets and swap those babies around if you're having real issues. Frankly, that's why I'm a li'l jealous of you for getting that druid. You already have the two best overall mana regen trinkets in the game right now, with the Heroic one still being a BIS item, so you're already over halfway there. Just get yourself an Althor's Abacus and you'll be able switch up for anything.