Those lvl 70 ppl make sure your attunement will be done as soon as possible!
This can help u :
http://wow.allakhazam.com/db/guides.html?guide=953Karazhan on Monday / Wednesday / Sunday at 20:00.
Signup for raid on Group Calendar v3.3.1 if you will be not online 15min before time its -5dkp! Ppl will be picking carefully(best xp/geared guys) until Karazhan will be cleared first time!
After that there will be more Kara and door will be open for less experienced and geared ppl.
Thx for understanding and patience.
Guild progress is always number 1