I did the same thing with thunderstorm and totem of wrath, don't worry

As for the enchant, they make a huge difference when you get em on lots of gear, on all your toons. As for having an enchanter friend do your stuff, I hope its just because he has a formula you don't. Otherwise you need to pick up enchanting! It is a great source of your mats (ie saves gold) when running instances etc.

Disc priests can seem pretty ridiculous at first when trying to kill something, but the key is going to be dispelling at the beginning of the fight, and at key points throughout the fight. Make sure you get all the buffs off someone before you lay into them. As soon as you see PW:S and Renews start to show up, spam dispell and then continue dps. You should be able to out dps the priest. I will say though, lightning bolt/chain lightning dps seems a bit lower than it used to be. Even still you should have enough with five guys to kill em through priests.