You can revive fallen allies with adam warlock even if you’re not in range.

Since the revive radius is based on adam’s position and not where he drops the ultimate, you can cast your ultimate in a safe place and then move towards your fallen allies and they will automatically revive as soon as you come in range.

This also works if you get killed after casting your ultimate and you’re in ghost mode.

Just fly towards your allies and you’ll be able to revive them.