The drop rate on later servers is different than earlier ones. I dont understand why they made it that way, they just did. Some strategies may work for some and some may not. The only thing we as players can do is, play the game. Make suggestions, etc. Now, they say free and yes it is completely free with an option to buy if youd like. Totally within reason. The game can be played for free however. Anyway, I am getting off topic. For me, I have been hitting lvl 4 npcs and generating a medal about 100 or 150 attacks. I dont sit and actually count them but I know at times I have gone 3 or 4 days before getting one and I play alot. like 14hrs+, So yeah, attack attack, and when in doubt attack!!!