use multicall for arb()

[rouzwelt]

can arb() calls to find opps be done through multicall?
instead of async calling each one by one, which I suppose will end up to be much better approach overall, but one thing to note when doing multicall for large number of calls, is to be aware of limits on calldata which as far as I researched is about 46kb at this time, so if the overal mutlicall calldata exceeds 46kb, it can be broken down into 2 sep multicalls with calldata that is within the 46kb range