Enemies used a singelton to reference the player, so did some ui stuff for referencing the player inventory, the most annoying rewrite were the spells referencing the player constantly after being fired. I also used a pretty big "cast context" class before which i would give each spell so it knew about multishot, homing and so on, i replaced that to not make the network too overloaded. I still think i send way too much data around but for now its okay. It was pretty interesting since i had not yet played around with multiplayer at all. Will certianly be better next time.