I did this map on about 4 goes, the RNG was strong with me
In the end I used 4 blanced ish squads with speeds ranging from about 400 - 500 and just put it in the lap of the gods
I don't think that's about all you can do, may help to have 2 slightly faster for the longer run ins, but it's not a must have as I ensured 1st one to the boss would not kill it