XVE Game Engine: Thinking about AOE Damage Effects

I'm back on my home game engine and I need an area damage effect, which can apply to all the members of a team/party.... The trouble? How to synchronize this over a network connection. First of all, I know for certain that the server running my game world knows the center of the effect, and it knows the radius of the effect. And it does tick the effect application against each player whether their…