Ah yes, have a bug beach spawn literally on top of the drill
Ah yes, have a bile titan spawn 5 feet away from the drill and instantly spit vomit all over it, with 0 time to kill it before it does.
Ah yes, have all bugs instantly set the drill to high priority and ignore literally everything else
Seriously how the fuck are you supposed to do this mission??
The other thing we did that seemed to help, pop round the map and close any bug holes that you can before doing drilling