When do they lock defense levels for war?

@LucasDaoc
That’s what made sense to me too, except the defense should also be able to be adjusted during war prep phase (your roster should’ve already been accounted for, regardless of who happens to be in your war defense team at the time. I had two alliance members who opted in war for the first time, but their war defense team didn’t have 5 heroes, had they heeded the calls, they should’ve been able to prep the entire team during war prep phase, but instead, they were left out of the war they opted in and wondered why they couldn’t participate.

Even if the mechanics should be common sense, the devs should’ve just said:
Players can edit their war defense team anytime outside an active “war” because battle to most players is like the usage of one war flag.