6-row does have more DP than 2-row, but both have so much it's not a practical consideration anymore, unless you're using a kilned base malt with low DP. Briess 6-row is 180 DP, while their 2-row is 140 DP. As long as the weighted average of the grist is over 50 you'll get conversion, though I'd target 70 to be safe. As Jeff pointed out, that's a 50/50 mix with NA 2-row.
You might think about using corn instead of rice. Rice is pretty neutral. Corn gives a sort of sweetness. I got a recipe from a former Coors brewer who consults for micros now. He said to use 17.5% flaked corn, 17.5% flaked rice, and Bo-pils for the balance. One hop addition, between 13-17 IBU.
But if you're set on making "crappy beer," just use sorghum syrup instead of malt, use bread yeast, and ferment at 95*F.