You need to be agressive and keep the Arbiter on the run or on the defense. Your argument against the arbiter is that he can virtually destroy anything; well what do you expect from a Hero that can demolish armies. That's his nature. if you attack his economy in the beggining, his rage would only destroy himself.

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How to tell if you're cool over the internet:
1.You correct other peoples grammer
2.You wait for people to err in their reasoning
3.You noticed I spelled grammer wrong you're a legend for noticing
4.Your logic is always sound and your opinion is fact