Depence on what grade? Higest possible damage weapon is an +4 TSu*SLS for B grade all the way up to 75 if you got buffs.
Unbuffed go get any top grade blunt, but with buffs duals add insane much more damage, two handed swords to works fine, thoght the highest one who got crit sa is low B.
Personally, I have always gone the high damage low con route since most of a dwarves carrying capacity is based on skills it gets as it levels and not really on con.
Also, Plechan is right, you can either get top A grade duals and risk blowing them up for a handful of patk or just go with the sensible efficient and effective route. Of course some just want A grade and if thats the case get A grade crit duals.
Thers no A grade crit duals, in fact TSU*SLS is not even top top B, it's second top B, Also one of the easiest weapons to obtain for the most effcient price curently in L2.
OE them is not to bad either as worst case you lose about 10m. Best senario you lose nothing :P like I did when I made theos duals a very long time ago.
If it's an EE your beter of with a shield, so I wuld say Elysian Axe, the SA dosnt really mater and if you manage to pull in one, +100m go for Haste or helth.