Asajj Ventress's fate is unknown
No she doesn't.
yes, he's the one with the phase 2 armor that asajj ventress kills with her lightsaber while choking him
No she doesn't. But she did somewhat "disappear" shortly before "Revenge of the Sith" took place. To learn more about it, follow the related link below.
No
Dengar didn't die in The Clone Wars. You might have it confused with someone else
The answer is yes
mr pink
No, he is alive in episode 3, so he must live through the clone wars.
Echo did not die in clone wars he showed up in season seven
"Orders"
yes
Mace Windu dies at the end of Return of the Sith, which takes place at the end of the Clone Wars. He does not die during the Clone Wars television show.