Since your first slow provides the listed charm bonuses, and the second is simply a "Use" charm, I'm new enough to Mage to wonder if any EE on the second slot charm is counted?

ie. If I have 2 Godly Charms, something like:
Epic Earth III
+40% Heal Mastery
+1200 Mana
+40 Int
+10 Mana Rgen
+1-20 Mana Per Attack
+1000 Life
(Yeah, I know- this is probably not rollable)

and

Magical Focused Heal XII
+ 220% Enhanced Effect

If I used the awesome stat (but poor damage) charm in the first slot and the awesome heal power (but poor stat) charm in the second slot, would I get the EE benefit to my 2nd slot heal?

Thanks.

The only stat counted in the acc. slot position is EE. Effectiveness of the charm is reduced to 75% while in that position, but mana cost is also reduced to 75%.

By having heal mastery in the primary slot position you bump the effectiveness back up and in turn you get better heals for less mana.

mana cost is only reduced in the acc slot while in catacombs.

Thanks guys, it sounds like I may have been on the right track in my thinking for this. The 75% values are interesting- though don't really change much in the big picutre.