Most of the time, there seem to be only one possible path to reach the spawnery, with sometimes another path blocked off by rocks that takes a long time to clear out.
Most of the time it feels like a swarm of jumping heavies is the only way to get around.
when not using jumping heavies, i feel like the only way is wait until the chirons are out of ammo, and then try to cross the very narrow chockepoints.