Well. What can I say that you don't already know ?
Or am I the only one surprised that a single relica could wipe out the training and skillset of a communicative professional e-sport team ?
Just by hitting a key, F or whatever, you are invincible and the well-timed, nasty combo that you opponents prepared is just collapsing because you decided not to die. Wow. #SuchTalent
The current version of this relica is a very bad design because it doesn't favors the players skills. Even in 1v1, assassin moves are lowered because of this.
My point is that in the end, it doesn't enscourage the player to improve his moves, because his opponent will use Sanctuary anyway. Of course there is cooldown but it's still too OP.
My suggestion is to go back to old Aegis : you are invincible, but you can't move. That should be ok.