Is that reroll all one's or reroll when you have more than 1 one. if you roll 2, 2, 2, 1 normally you'd get 6 (drop the 1) but if you reroll all threes you could get 10. 6,2,2 (drop 2) if you take the 6 but would reroll 1 one on a 2, 2, 1, 1 then I think it would be better.