FFS. Guys, did I say "GALEN MAREK" or "STARKILLER", Galen Marek's clone, who should be described already more powerful than the original, as I think he is equal or even above the Dark Apprentice.
I don't support the claim that the uncanon defeat of the Apprentice at Sidious's hands is accurate because he is, as I said, already more powerful than the original and he has two sabers. If Sids intends on Lightning whoring during a saber lock, SK can block it with his other saber--which brings up another one of my ideas that as powerful as Dooku is, I can see him barely on par with Starkiller's flurries as shown in the E3 trailer.
I think it's fair to me to think that Mace did have Sidious in trouble quite a few times, who constantly backed away. The only thing stopping Mace from killing Sidious after a closed-in lightsaber duel is the fact that I'm letting Sidious use his other saber as a backup, and lightning wouldn't bode well when Mace can deflect it as well as he did in ep3.
The clone of Starkiller did things far above the original's capacity, like surviving the open surface of a half-disintegrated freighter, which should be as powerful if not more powerful than Sids' lightning. Not to mention that he single-handedly fended off a bloodthirsty Gorog while on hard-to-balance surfaces and keeping himself occupied with Stormies. I don't care if Galen died because Sids got him in close quarters. As I said, this is the way more powerful clone who won't have to worry about saving a Rebellion or have the time to listen to Jedi guidance that advised against killing the Emperor right then, right there.
Dooku can't match Starkiller in the Force IMO, but he should prove a challenge in saber combat. Still, Starkiller was very unpredictable in TFU2, and as depicted in the novels, Sids wasn't the only one who used the assumption of weakness to gain the upper hand, and Starkiller wasn't begging for his life.