Also there is that book of Striking that's good for Arte usage (but it costs an arm and a leg; I don't know how else to get the usage count to 9999 though, iirc there's an achievement or a title in that).
You need the lvl 9 (or 10?) turtle vendor. There's a turtle vendor right next to the arena desk lady and one arena run is around 50,000.
Buy then sell Rare Swords using the arena cash until you hit enough stamps.
If you don't want to lose money, just buy the Rare Swords, dualize them with something like Magical, Noble, or whatever $$$ property and sell it for like 5 times more. You don't even need to temper it, the selling price goes up just from sharding it.
I was rich enough not even to bother doing that myself.