I would imagine Team 1's strategy would be for Talzin to tank Sidious' lightning for as long as she can hold out and Vitiate would try to overwhelm Sidious and Dooku with his own lightning or try to prepare one of his cheap rituals.
I would imagine Team 2's strategy would mainly depend on Sidious powering through Talzin and Vitiate with his lightning. Dooku would have to do whatever he could to keep Vitiate busy.
If Dooku can stay alive long enough, I think Sidious could kill Talzin and then kill Vitiate. But I think more often than not, Vitiate would overwhelm Dooku more quickly than Sidious could overwhelm Talzin.
I voted team one but I'm still not sure.
Talzin would eat Dooku for breakfast, but then again so would Sidious to her if she had spent all her power battling Dooku.
Instead I believe this would play exactly like the SOD battle, Talzin just holding Sidious off via a Lightning stalemate.
Vitiate might take Dooku out quickly and then they gang up.
Alternatively Talzin holds off both Sidious and Dooku and allows vitiate to gather power for a FLS of similarly ridonculous feat.
Or Talzin just drains Dooku and throws him off like a carcass. Or she drains him and Vitiate mind dominates his weak state to fight with them and it becomes a massacre.
So many outcomes...