why not just allow sparking on alpha 1 and 2 islands and perhaps a cooldown one for gamma. whilst i can understand its good to be able to defend your outposts and SAPs on beta by sparking it does kind of break the game for newer players and corps. there is no element of surprise really. you turn up to a sap and the whole corp teles to their outpost undocks in mechs and facerolls you which is only fun the first few times. it also means its much easier for a larger corp to hold control over lots more of the map that they dont even use.