In my opinion, the scope is a very useless thing in the game.
Every self-respecting kingdom knows how to send a snipe so as not to be spotted by the scope. For example, on III trier snipe 44+1, on II 36+1 etc.
I think that with the best scope, upgraded with 5 crystals, we get nothing in return anyway. It is very easy to avoid. I think it would be necessary to update the operation of this item as it was with the horn of attacks.
It's a very useless item at the moment.