A 3/8ths hose with 1/4npt milton high flow fittings is all you need, and then some.
I run a 100ft DeWalt 3/8 hose with the above mentioned fittings. I have a 33gal compressor, and with it turned up to 140psi at the regulator, my MG725 will zip off bolts torqued to 300ft lbs the same as it does...