You will get a party with the DF. you might just have to wait a little longer. As for the fight you can just tell them you haven't done the fight if they ask. Just make sure you wait and let the tank hit first. If he doesn't mark the targets for you just watch and hit what he hits. At the last boss fight (big fish monster) the tank and you will start fighting him then the grates in the four corners will start to bubble if the ads gets out you will kill them while the tank stays on the big guy. You will go back and fight the big guy between fighting the ads.