Depends on ur play style. All daggers here which ever played maxed STR. I have other opinion than that, and try to balance out between max land rate and x2dmg chance.
So it's only up to you and countless PVPs to show which will be the best combination.
Also that RACE question is not just a question, CON stat show that different races here have different modifiers from each +/-1 CON. So if we believe it comes the same for all stats, then AW/PW/TH have different x2 chance from each STR unit and same with DEX and land rate.
Land rate we tested in our CP, and it FEELS (no numbers, just experience) that AW needs less DEX to max his land rate (no buffs and othell), than TH