The Enigma Order

not sure if I follow you there? YOu're asking what I was about to do and what the thread stopped me from?
as I wrote above - was about to socket\enchant purely for AP - pretty much no crit, no agi gems. looking at the theorycraft - quite the worse thing I could have done.

Having been asked a few question about the content of the page I linked, let me sum up really briefly -

according the the calculus - which I have not tested\done myself!, though it's described clearly -

at around 1800 self buffed (meaning the way you are really going to play - think about aspect and TSA) one should shift towards agility rather than ap.

at around 2200 (though this one is a more vague value for me, concider it a distant estimate) crit chance is the way to go.

as I already wrote - quite surprising for me at least. for now I'm more or less following this, but not really sure how much it impacts my dmg. thinking about enchanting gloves with agility instead of ap at this very moment.

not an easy one to answer, come to think about it.
basically I'm getting my current stats mostly from talents-based ap bonuses (+10%ap, 45% int -> ap etc.) and gem\enchant-based crit. So survival would still  require quite a lot of changes. and, to be perfectly honest, seeing as we have Elris throwing expose weakness around like a madman, can't really see the point in gimping myself since expose weakness doeesn't stack.
could be an option at some point though I guess.