The raid isn't hard...it just takes people not messing up their part. Everyone has a job to do. Don't mess up your part and it's a piece of cake. You'll rarely die from the enemies. Most of your wipes will be from someone messing up on their job. That's it. Practice and learn all the roles so you can help others understand what to do. Once everyone is absolutely sure what they're supposed to be doing then the rest is very easy.