The Black Mage Rotations

[Borfin]

Its not stat weights, its the effect of your skill choice on your average damage. The higher your average damage, the higher the damage bonus you get from your criticals on average. When you're using nothing but fire3/flare/blizz3, your average damage skyrockets, because you're not spending time hitting mobs for 450-600 blizzard2 or fire2s, you're just flaring. All your calculations don't take this into account.

tl;dr - Crits mean more for flares than they do for blizzard/fire2s. The PPS should reflect that.

That's not how math and multiplication work. :P

150% damage is 150% damage whether that's for a 100 damage hit or a 1000 damage hit.

It means the same across the board.