Both Welf and Aasimar can yield 100% standing doublestrike without raging for both STR and DEX tempests. I think Sexy Dexy Aasimar has a small leg up over STR Welf primarily due to better gearing options. Overall, any STR tempest will do a just a little more DPS per hit; BUT if you play aggressively, a Sexy Dexy will keep you alive longer, and still hit exceptionally well. I play both STR Welf and DEX Aasimar, and both have a common baseline of PLs. If I need to get **** done, I go with Sexy Dexy. If I'm casually soloing R4-5, I'll roll with the Welf. I agree with Teh-Troll's comment; "best" is subjective, "Strong" should be what we're all after. ...and maces are a trap