After achieving many 2:01s, I didn't think it was possible to go faster.

I believe the timesave comes from destroying the Elementals (which prevents them from blocking the path of the MFBs), killing the Strider in a position that doesn't block the MFBs. It's also important to make sure the MFBs are sent to their objective as soon as the mission begins.

It may also be possible to achieve this time by leading the Elementals and Strider away from the MFB, but I haven't tried doing it that way (or any other).