Guild Wars 2

I am getting back into the game and I currently play a Thief. I know thief is good in WvW for roaming so I have that down. What I was wondering was what is a good profession for Team Fighting in WvW?

I currently only have a Thief and Ranger at lvl 80, but I have the boost to lvl 80 item (if I even choose to use it).

Guard, necro are the most common staple of larger groups. There are others, and I prefer ele in larger groups, some boon share with Mez, and Rev offers flexibility.. but generally guard and necro if you are doing one more class.