1. Mace has an ASPD penalty on Thief class characters, as far as I know. Seems that not even two Ds can raise it @.@ Oh well, you've already seen other Sins with maces? Perhaps they took Awake potions and got Adrenaline Rush?
2. Shift rightclick or CTRL rightclick I think @.@
3. - Have a Blacksmith/Whitesmith.
- Make stats: Only DEX and LUK, and DEX = LUK. Let a Priest buff you with Gloria and Bless. Get DEX and LUK gears.
- Get the skills to make a dagger on lvl 3, Weaponry Research lvl 10 , and Research Oridecon.
- Get all the ingredients for a Damascus, plus a Flame Heart. You can use Star Crumbs as well to make your weapon "Very strong" or "very very strong".
- Use an Oridecon Hammer, choose Damascus, and drag the Flame heart (and the star crumbs) on the free slots in the window. Then click ok.. hopefully you are successful.