Count Dooku & Arcann run the duo gauntlet

R1: Ahsoka and Barriss Offee (TCW).
R2: KOTFE Senya and act 3 Barsen'Thor.
R3: Obi-Wan and Anakin (AOTC).
R4: Kit Fisto and Saesee Tiin (ROTS).
R5: TPM Qui-Gon and AOTC Obi-Wan.
R6: Maul and Savage Opress (TCW).
R7: Maul and Obi-Wan (TCW).
R8: AOTC Mace and ROTS base Anakin.
R9: ROTS prime Mace and Shatterpoint Depa Billaba. 
R10: Sidious and Yoda (ROTS).

Feel free to correct the order if you believe it's wrong. 

Fight to the death every round.
Prime for both (ROTS and KOTET).
Duo are healed and refreshed after every round.
Start 10 metres away from their opponents each time.
How far do they get?

Hard stop at 10

they sweep through the first 7 rounds .

i can see R8 team taking it :
arcann is sort of a weak link here ,
either mace or anakin can kill him and each of them can hold their own against dooku untill the other takes care of arcann
after that they double team tyranus and take him down .

R9: if by prime mace you mean same boost as he received against sidious than he solos
R10: either yoda or sheev solos .

Stops at 8

8

i wanna say stop at 8 or 9. somewhere between 8 and 9 almost