I think you are forgetting Matt Jones in 2015. I saw your comment about Grayson, but before they started playing him more Duke did have Sheed until January when he was kicked off the team. So really that year they had Tyus, Cook, Jones, Allen & Sheed until January. The other two years you are correct Duke wasn’t guard heavy but Dunleavy was pretty much a guard in 2001. Nolan & Jon team only had Dawkins as backup guard that came early. So they played pretty much a big lineup in 2010 and didn’t have much of a rotation except the big 4 front court players. Nolan, Jon and Kyle played almost 40 a game. Also Duke got very lucky no injuries happened in any of those seasons. Because they would have been no shot if one of those guards you mentioned went down.