WF Fighter/Wizard/Monk???

[Holgar]

Hey, all.

I have a level 13 WF named Steam who is currently Fighter 6 / Wizard 7. He works wonderfully as a self-buffing, self-healing tank (only 18 int. for buffs, but 30 Str for killin' stuff).

His next level will definitely be fighter because of the great enhancements available at level 7 (Fighter Armor Mastery 2, Fighter Haste Boost 3, Fighter Toughness 3).

After that, I was considering adding 2 levels of Rogue to grab evasion (Steam has a Mithral Body), but I thought that would be a waste of all the Rogue skills that I should have grabbed at level 1.

So now I'm considering adding 2 levels of Monk. I know I'll be missing out on most of what the Monk has to offer, but I will be gaining:

1) +3 to all my saves (much better than Rogue which would only add +3 to Reflex)

2) Evasion (this works with Mithral Body, right? :-)

3) 2 Feats (probably grab Toughness and Dodge)

In addition, I have some questions:

Is a Monk with Mithral Body considered to be armored for the purposes of the Wisdom Bonus to AC? I don't have much of a Wisdom, but wouldn't mind the extra boost.

Assuming I qualify for the Wisdom bonus (even if it means getting rid of the Mithral Body), do I have to be centered to get the bonus as well? My greatsword would kind of keep me permanently uncentered!

EDIT: Does a Monk get +1 AC at Level 1 even if he is uncentered? If so, does this work with Mithral Body?

Thanks!

Holgar