There are a lot of variables on this map and I almost restarted my run because the at-te split up. While it isn't necessary for them to stay together, I've found that the east command post is rarely defended by my team. It actually worked to my benefit though, the spiders were firing on both at-te's simultaneously because they split.

This run just worked out. Time could definitely be saved by spawning right next to the ships in the Spire.