Change 5min instance zone after boss kill to <1min, something like in kartia. if you port out - instance zone gone. now when half server goin there sometimes it's almost impossible to enter. and that 5 min instance zone.. for example this thursday 1st enter was pretty fast.. done inst in <3min. but to enter 2nd time with another grp was something special.. had spam npc for 40mins nonstop. yes. 40. or change something for those who port with 2-3 different clans and leave 2 of them afk when doing instance with one.. so for 1 or 2 min inactivity (not hitting mobs) simply port them out..