On the subject of hit and expertise, I did a small test (2000 attacks) for my pet.
As I remember seeing someone here ask about expertise, and if it had any effect on pets.
I happened to get a ring with 33 expertise rating (4 expertise) so here's the screenshot:
http://i162.photobucket.com/albums/t...208_152040.jpg
2/2 Animal Handler, 4 expertise. --> 3.8% dodge
1/3 Careful Aim, 195 hit (5.95%+1% from CA). -->2.9% miss.
On the heroic training dummy in IF.
The hit surprised me, as with close to 6% hit I expected my pet to miss 2%, not 3.
I can't say anything about expertise as I have no clue how much dodge a boss has/is supposed to have.
edit: on second thought, this might have been better placed in the pet thread.