Notification of Revenge Target
My suggestion is that I can pay gems to be notified of when a revenge target is available. So it works like this. I pick a target to revenge, I get notification that that target has a shield or is online. I hit a button to pay 10 gems, 20 gems, (pick a number) and when that target is either no longer online or no longer has the shield, I get a push notification. If I am able to revenge that person, the gems are deducted from my account. If the shield is back or the target is online, I get the option to either keep it going or get the gems back.
Note, I'm not asking to break a shield, I'm merely asking to be notified, and pay a price, when a target is available to be revenged. Too many times I click revenge and get the "This user is online" message and then two minutes later when I click again "This user has an active shield".