Level 39, and 45 Bonedancer nuke pets have much slower cast times, resulting in lower dps than lv 33 spec nuking pets

Level 39 Darkess spec pet: 3.0s cast lifetap, and 4.0s cast dd+snare.
level 45 Darkness spec pet: 2.0s cast lifetap, and 3.0s cast dd+snare

level 33 and below: 2.0s and 2.0s cast.

With these values, the level 33 casting pet does 15-20% more damage than the level 39 spec casting pet when taking casting speed and nuke delve into account. This makes the level 39 pet useless, and the level 45 pet inconsistent with the rest of the darkness spec pets.