This post is a reminder to everyone how helpful it is to use google to find all information possible about bosses in the zones you and your guild are raiding. Every single member interested in raiding a zone should definitely know strategies from Wowikki and when it comes to bosses your raid finds difficult, you can even find videos from the perspective of multiple classes on youtube of fighting those bosses.

This will give you a first hand look at what you do while you fights that boss.

Raid leaders will go over strategies in vent and chat often, but man it is such a load of help for you guys to know the ins and outs of these fights.

If you are new to Karazhan (or any instance) it is especially important for you to familiarize yourself with the fight before you step foot inside. What we need is dependability, not more people to have to watch over and walk through. I myself try my best to be one of the guys who has more answers than questions (Though I still have plenty of questions). 

So, read up and research!