Ok, let me just sum up this whole thing here, as I am a complete newbie to theoriecraft (not so new to enhancement after all... 2.5 years now

)
As I understand it, the values to have are STR, %crit and %hit and of these about
:
2200 AP
27%crit
22%hit
Now I do not have a problem with hit (19%) or crit (28%), but with AP (1374 unbuffed).
This is mainly because I raid Karazhan and take every "Enhancement looking" gear I can get my hands on. Problem is: I have tons of Int and Mp/5 on these things (+on my ebon dragonscale set).
For Weapons i have Fool´s Bane and Moroes´s dagger (which i will replace with the slow arena-axe soon).
So: my obvious question is: how will I get more AP? I mean, it´s not like 150AP, but I need another 800! Merciless Gladiatior Set will have much strength on it - but at the cost of %hit...
So: where do I start? I am quiet pleased with my current performance - but knowing there could be MUCH more and NOT knowing how to get there is a bit frustrating.
(2) Second question: every time I see a socket in here it´s filled with +8STR. Is it REALLY the choice to take? Or shouldn´t I get other gems fitting that socket (like +4STR, +4crit = yellow gem) to get the socket bonus ?
for anyone who would investigate my problem further: the link to the german armory.
The Armory