If you got really good pot rates, go with SD rate on Sets. If not, might as well use DDR. For swords, it depends on the opponent. Use SD Dec Rate to stop his SD sets. Basically, everything Critical Damage + SD Ign Rate/SD Dec Rate/Critical Damage/Skill Atk Dmg works just fine, and vice versa.
Btw next time just use the search function in the forums. We got countless topics like this anyway. Happy playin'