GPit Soldier Setup (Short TF2 Competitive Reference)
Quick upload for the team I'm on. Feel free to skip over this one if you're just a regular subscriber.
This illustrates the paths that soldiers can take during gravelpit setup time on defense in order to feed both the B engineer and an A engineer extra metal while still getting to B short tunnel in time to get full heals and spam the door.
This is obviously done a little sloppily, and I'm not at all a main soldier, but the fact that it still worked out acceptably should show that it can work. I was able to reliably pull this off many times in a row before filming it, so any main soldier should be able to get both routes down easily.
Soldiers MUST suicide before the 0:41 second is half-way over (or earlier) or they will have their respawn delayed by 5 precious seconds. With this in mind, the soldier to go for the point A suicide (a longer route) should be the one who will get out of resupply fastest based on where he is at the end of the 5-second starting freeze time.
The medic should heal the B engineer until about the 0:15 second mark and then head over to the short tunnel area to heal up the soldiers. He should have uber by the time that even happens, so don't worry about it. Healing a soldier at ~100 (about where they should be at when they get there) to a full 200 takes about 4 seconds, so the medic should have an easy time getting the soldiers to full if they get their routes right. If everyone does their jobs perfectly, both soldiers can be fully overhealed when the gates open.
If each soldier can do their half of the video correctly it'll result in each engineer getting +100 metal with which to work while having effectively zero cost.
Hope it's helpful.
~G-Mang