I have both:

Ironbark Staff (http://www.thottbot.com/?i=51395)
Finkle's Lava Dredger (http://www.thottbot.com/?i=37426)

Can only afford to throw one enchant on one of them. I typically use the staff because of the +heal, and if I see myself getting low on mana I swap in Finkle's. I also use Finkle's whenever fire resist is a big concern (fire packs in MC, bosses in MC or BWL).

The enchants I have available are:

Enchant Weapon - Mighty Spirit (http://www.thottbot.com/index.cgi?sp=23803) +20 SPI
Enchant Weapon - Mighty Intellect (http://www.thottbot.com/index.cgi?sp=23804) +22 INT
Enchant Weapon - Healing Power (http://www.thottbot.com/index.cgi?sp=22750) +55 Healing

My first thought was to throw +55 healing on the Ironbark Staff, to make it an even better healing weapon and just use Finkle's when I need FR. Or would I be better served with the healing on Finkle's and use that all the time? Really unsure what approach to take...

If it helps, I only have around +200 heal gear, bumps to +240 with Ironbark Staff equipped.

+55 healing...worth it in the long run. 22 int is only 330 mana (w/o HotW). Thats one heal. 20 spirit isn't worth the mats. As an enchanter, I've never seen anyone ask for this. I initially had 22int on my SoD, but switched to healing. You'll notice the difference.

And get the enchant on your Ironbark staff. The mana regen is nice on Finkles, but I would use it selectively for certain fights in MC/BWL b/c of the FR. Just my 2 cents.

I was gonna put a +55 healing enchant on my Headmaster's Charge, but the mats required for that enchant is kinda high. Unless you're absolutely sure you will be using the Ironbark Staff in the long run, I would just drop a +22 int enchant on it. That one only takes disenchant mats, which are easier to come by. Just my opinion. :O

Hah, I hadn't really looked closely at the the mats for +Healing:

Large Brilliant Shard x4
Greater Eternal Essence x8
Living Essence x6
Essence of Water x6
Righteous Orb x1

Compared to the +22 INT:

Large Brilliant Shard x15
Greater Eternal Essence x12
Illusion Dust x20

Both will be fairly steep, but the Righteous Orb sure jacks up the price for +Healing..