Increase @killcount slot amount
Description
Increase @killcount slot amount to 5 or more.
Rationale
Many people like switching between grinding spots instead of just grinding the same thing over and over again. Sometimes people like to keep a killcount on certain mob for a very long time, maybe out of curiosity, maybe to check how many they killed for 4 cards. 3 slots are quite limiting, sometimes a single spot can take all slots, 5 I believe would strike a good balance between good user experience and server performance (if current limit is dictated by some sort of performance issue, otherwise it could become even higher cause why not).