Just a suggestion, to make things a little easier.

So, if you have 10 tokens and want to put them all into the Arena, you would have to repeatedly click the button ten times or until you ran out of tokens.

I was wondering, if we could make it sort of like the Easter Event Donate Egg Layout. You know? The drop down menu that lets you pick how many eggs you want to donate? Except this would be a drop down menu that lets you pick how many tokens you want to use in the Arena.

So in Summary
-A drop down menu that lets you choose how many tokens you want to use in the Arena.

I don't think anyone has suggested this, I went a couple pages back and didn't see anything.