What came first, the Pros or the Arenas?

I'm curious as to whether the Arenas were designed around the Pros, or vice versa.

What I mean by that is, I've noticed that you can lunge as an Assassin from the spawn ring on Ammo Mule to the very edge of the arena without falling off. When trying to jump from the center area to the spawn ring in Ammo Mule, I believe every class but the Support can do this. Also, in LazeRazer, every class can jump from the middle squarelike area to the inner ring, but not every class can jump from the spawn ring to the squarelike area. Were the Arenas designed around the Pros' skills? Or were the Pros' abilities designed around the Arenas? Or was it all just random?

Good question, i would say the pro came first as it seems to be the right way to start a game would be to design the characters first.

Reserved for Eka, so he can say im wrong.

Definitely pros. The devs have posted some screens of the game in early development and the arenas were nothing like they are now.

Arenas are built with certain jump heights, distances, etc in mind so it started with Pros. During development we did go back and forth between arena sizes, pros abilities, etc so it's not that simple.

I was just wondering whether it actually was tested, or if it was completely random. That answers the question, thanks!