Pirate mobs stats change

@wushin as discussed, Major points are LUK decreased from 80 to 60 (warriors can fight them too now) and Grenadier's attack range reduced from 8 to 6. Also some rather minor changes. EXP for them are nice now, makes the pirates beach a good alternative to level alone but not comparable to crypts/graveyard raids (we need to gather the players).