The built in phono in the Strata mk2 has 57db gain and 100ohm impedance.
Gain’s fine but 100ohm impedance could be a bit low for the ML. To break it in I was loading it at a 1000ohm then dropped it down to 400ohm after the break in. 100 will probably be a bit too polite sounding but that highly depends on the rest of the system and your listening preference.
I wouldn’t worry about it initially but for the ML to give you the proper ROI, a good phono stage is a must. And down the road good phono cables between VPI and phono stage

