Found this while googling stat allocation. Thought you all might find it useful. I messed with it for awhile, and for S1-H1-B3-D2, DEX is better than STR up to the crit cap in nearly every circumstance except for low levels. Basically 1:1 until you have high physical damage, which will not be a problem for Doppel Barb builds. After you have high enough physical damage, DEX wins out.
DPS Swordies also have the added benefit of not needing to invest anything into CON.