This aint transformer battle. Its Zelaron Melee.

Exactly, he wait for X in a place HE built to help HIS Body he doesnt built the body to fit the room. In this case the room isnt made for anyone in specific. Which make it quite impossible to use his big form.

Your not getting the point. It would be like shooting a fish in the wrong barrel. If he is higher then the plateform he has no control over anything that is going on under. If he is holding himself at the plateform(middle) well the plateform would limit him, making him have no control on the higher part and lower part of the arena. Sure, he would be good in the middle. But i wont be going there. If he try holding on by the middle plateform he would end up falling in the lava because i would kill the chain that hold it together. If he is under he wont have control over what is going on higher then him.

No matter where he is it would create easy area to safely cast and destroy him without having to really worry about anything. Making his big form totaly useless. He will have control of his area. But his area will basicly be filled with nothing more then air and himself. He can poke the air all he want. He wont achieve much of anything.