So testing the reg shears gets about 3 stacks plus 43 leaves. where as the invars ones give about 7 and some change of leaves. The silky axe doesn't broke from braking leaves but brakes them and 3rd slower then the shears. I haven't tried with max redstone? The question is what balance reason is for have the recipe for silky gem cost on block. if there is no balance reason for it then in skyblock type mod packs it shouldn't. Their is also a pre shears? they would be hard to make so you that would be an end game item i think?