Skills like Windmill, Combat Mastery, Magic Bolts, Ranged Mastery, and many more have certain requirements that need to be met before you can enhance it to the next rank. Although the first letter of the team, more readily available, the number of teams began to pose a challenge in Mabinogi.
While this list seems not too challenging at first glance, Average wind up five, they will find it very difficult to face the boss type monsters in game (Mabinogi Gold), they can be easily done. For example, we must personally be difficult to run the Ciar dungeon settings, and find a dark magic to complete as a boss type, because regular Golem is considered Awful for us. To finish 450 of these Dark Golems would take a ridiculously long time.
Do you understand why people want you to rank windmill before any other melee skill? It is the most demanding melee combat skill for training. This is why people recommend that you try to maintain the lowest possible power level (Mabinogi online gold) of one of several reasons. Your Power levels can hinder your training exp wise, and delay skill training from what should have been hours to weeks.