I use to play Neverwinter Online before I played all the end game content to a point of being sick of it. They had these things called skirmishes where it would match you with 4 others in the queue and you would be thrown into an area to fight waves of enemies co-op style. I know about the eldevin arena but I was thinking more like a list of instances sorted by level, with seasonal and random additions also. That was my favorite thing to do in neverwinter and I would like to see something like that in eldevin.
And I apologize if I am describing something that already exists in eldevin, feel free to educate me