Some people might look at these results and wonder if they can possibly be right. Remember, slow increases delay*, but this is not the same thing as decreasing the number of attacks, which is what I'm interested in. Carnage Elegy has 50% potency, and increases 100 delay to 150. In 300 delay such a monster would attack 3 times without elegy, and 2 times with elegy, or a 33% attack speed reduction.
A simple math check also confirms that these results are reasonable. 180 seconds = 10,800 delay / 30 attacks = 360 delay for a Tiny Mandragora. With Slow I, delay becomes 1.30 * 360 = 480. 10,800 / 480 = 22.5 attacks. Hojo Ni should yield ~25 attacks, for reference.