Protip: you can see every teammates' current EU collected. Then, it's just maths.
I also estimate that there's about a 2-minute turnaround time to launch a battleship on average, so subtract around 120 EU from the required total EU to launch and that's what you should plan on having the team gather.
I'm a big fan of only having 1 person on the EU tree at a time so that at least one mech might make it back instead of two getting caught with their pants down. The other pilot who isn't gathering yet should move towards the enemy base a bit and fall back if they see the enemy coming. I yell at every person that steps on the tree with me before I'm done gathering. The protocol of using an EU tree should be like using a toilet - theoretically multiple people can use it simultaneously, but only one person should.
Also, unless my whole team on voice chat or I know the enemy team just got wiped, I only fill up my mech to around 150 EU and head back instead of waiting to be ambushed with 200+.
Then again, I'm saying this in the wrong forum because I don't have access to the console areas, which is where this should actually be said.
Edited by TheButtSatisfier, 14 July 2016 - 12:30 PM.