That's awesome, glad you had fun! A dice's attack speed is "base attack speed / level", so, if you had a level 2 dice and the base attack speed was 1.3, you'd have "1.3 / 2", so, you're right, you can have 2 x 1.3 / 2 OR 1 x 1.3 / 3 -- that math's says it's better not to merge, good job identifying that, that's a bad mechanic!