Spells!
Here's what I've got. Most of this I'll just cast on myself if there doesn't seem to be a better option since a healer has to stay alive to heal. If someone has better ideas for the spells, though, let me know
Blur - Attacks against you have 20% miss chance
Fly - Self-explanatory. I have enough movement that I can go almost anywhere with ease, but fly would allow me, personally, to circumvent many obstacles.
Ebon Eyes - I have two of these, so if Lia casts Blacklight or someone casts Darkness at some point, this spell will let you see through it normally.
Consecrate - x2. I can throw a holy water at a patch of ground and that area is consecrated within a 20' radius. Undead in the area suffer -1 to attacks, damage, and saves. It's not much but every little bit helps. It also prevents any dead folks from coming back as undead.
Death Ward - I have two. Could be handy if energy-draining undead show up again. They are level 4 spells, though, and if I cast both of them, I am out.
I've got some other stuff, but these strike me as the most potentially useful. Just bear in mind that each spell I cast means one less cure if it's needed. Blur is the exception since it's a domain spell.