Welcome to the Arena

PvP on poles:
acrobatic checks to stay balanced and move half speed, exceed by 5 to move full speed, failure to fall prone on floor. You can also use climb check to climb down to floor. Height from ground to top of poles 20 feet (fall damage?).

Strategic options: 20% cover from a ranger if u go to the floor and they're on the poles.

PvP arena with shadows and trees, supporting stealth fighters, 60 ft diameter.

Obstacles: climb check to reach a height, fly check to glide down into a lake, into a swim check (with some dex modifiers?) to outrun dangerous fish in waters.

Riddle Obstacle?: Sense motive/Widsom check to decipher riddle and appraise/perception/knowledge to give the correct answer or item to the riddler.