Hey Chaielle,
Our team is definitely AOTC and high keys, we are not a casual mythic raiding guild. Server transfer is definitely not to be rushed, we have no problem waiting until you are comfortable. Our play times are perfect as well, raid times are Tues/Thurs 930 Central to Midnight Central. Our guild is definitely most active around these times with no raid loggers.
Selfishly we would love to play with your shadow/holy priest but we always want you to play the class that is the most fun for you. Evoker would also work out well as we only have an Aug right now. Ultimately it is what you want to play, I will shoot you a discord request and drop our g spam as well, but looking forward to talking to you on disc!
Take care!