So, this might be a little bit nitpicky but, I was helping a friend doing the Bramble fight boss quest and well, at the begging of the battle he creates this poison barrier on the way to the arena and, since I wasn’t doing the quest, I didn’t get the potion to pass through it without taking a lot of damage and dying in the process, yeah I could use a lot of HP potions and healing stuff to pass but still, would’ve been cool to the potion item appears to everyone involved in the battle or something…
should had tried going in there first before him might that work 
It does not work as I previously did this with someone.
You are redirect back to the entry point.
It should allow the poison potion to be a group buff instead. If you have multiple players in the same quest, then only one needs to do it.