Originally posted by Nephthys
His lightning was already potent enough to disintegrate,
This doesn't really put him on Dooku's level. Plenty of sith can disintegrate with lightning.
he's capable of tearing through the barriers of Sith Lords and utterly owning them,
Said Sith Lords are weaklings by Dooku's standards. Bane and Kas'im are the only sith of that era of any noteworthy power. Also remember that Dooku pulled off a similar feat against Obi Wan, and against three nightsisters while drugged.
he's extremely skilled 'beyond forms',
Context: Kas'im said that while teaching the young Bane a basic tenant of Force/saber dueling that Dooku, being a legendary lightsaber fanatic, certainly would have grasped. Notice that by that point, Bane still wasn't entirely ready to defeat Sirak yet.
plenty fast and strong
...this is supposed to put him on Dooku's level? Seriously?
and he has the temple destruction feat.
Impressive, but I doubt Dooku would give him time to charge up a Force wave.
Dooku at this point has vastly superior feats, taking on Yoda and holding his own, and Bane doesn't do very well against unfamiliar saber forms; Tyranus rivals Kas'im in technical skill.