I'd also say the 2" Blazers, Trapper. They impressed me when I tested them for a local shop when fletched on about a 6 degree offset. I found they did have their limits on how large of a broadhead they'd stabilize though. For me, they worked best with vented fixed blade heads, 1" dia and smaller, so I'm fairly sure they might could do an adequate job with mechanicals. Definitely attach them with an offset though, and see how they do from your bow.

On the other hand, I certainly wouldn't go out on a limb and say they work 'better' than a larger fletch. They didn't impress me that much. The smaller the fletching, the more critical it will be to have the bow matched perfectly to your arrow spine and tuned to perfection, not to mention having your shooting form tuned to perfection. Short fletchings are not something that I'd recommend to the weekend warrior or occasional shooter.