Peacebloom vs ghouls

Has anyone been able to do these quests as a group?

I can get it on one, and it says sharing, but nothing shows up on the others (was thinking it was like an escort, one person gets and all auto-accept).

Then I tried all get it with IWT. They all got it, one person does it, the rest just stand there with the game board up. Seemed good since they didn't have to play, just the one person. But, the one person finishes and no one else gets credit.

So I am not sure how I can do these quests on my groups. I got the flamefly in Burning Steps, but I wanted this one also. I just didn't want to do it 32 times (4 teams). Any thoughts or suggestions?

Or if anyone has any cool companion pets that they have gotten on their groups without just pure grinding. I have done the pebble quest 2 times on 2 groups. It takes 10 times, /cry. Also, most times, 1 pebble will jump the rocks early, then when the char goes over, he jumps back, which makes him go around and get despawned. I know about the go over the flat rock part, just seems that works really well, but with 5 chars, one pebble gets confused.