3 is needed anyway for getting a better skill later, why not get two more and the cancel for a extra help on pvp? But this really depends on the person.
A Maxed Ashen fork can really turn the world around in the pvp, but also it's useless in the dungeon and eats a lot of sp that could be spended on skills that have a high firepower.
It depends on how the player wants it to be, if it is a dungeon crawler character then 1 of ashen and 3 of charge crush is enough. If it is a beast on pvps then a 20 Ashen fork will help a lot and the cancel charge crush is also helpful.
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