The Black Mage Rotations

[O-Deka-K]

Unfortunately, even with the potency increase Freeze is still pretty bad. It would either need a higher potency or a shorter cast time to be worth using like Blizzard II in the old rotation. Even with its nerf, Blizzard II would probably still work better here...

I agree. Freeze only does 100 potency, which is weak compared to the rest of our arsenal. Not only that, but targeting the ground takes extra time and you could miss. I'll do the math just for fun:

Again, N is the number of targets and PPS is potency per second.

When I tried it back when 2.1 first came out, I could do this in 30s (theoretically):
F3 > F2 x 4 > Flare > Transpose > Freeze > Freeze (30s)
Potency formula: (1388 x N + 154) / 30 = 46.3N + 5.1 PPS

If you can do it faster and save a mana tick, then it would be 27s:
F3 > F2 x 4 > Flare > Transpose > Freeze > Freeze (27s)
Potency formula: (1388 x N + 154) / 27 = 51.4N + 5.7 PPS

I say theoretically because I couldn't actually do F2 4 times. However, the cast time is 3.0s (minus spell speed), so this would extend the rotation by exactly one mana tick (3.0s).

This still doesn't compare to the established AoE rotations:
Transpose > F3 > F2 > F2 > Flare: 55.2N + 18.2 PPS
Transpose > wait 2s > Flare > F2 > Flare: 58.8N PPS