1 episode to install the set up : Geto/Gojo saving Mei Mei and Utahime. Plasma vessel introduction and Geto/Gojo saving her.
1 episode of escorting the plasma vessel : people attacking her, her story, cheerful moment with her and Toji introduction.
I think we will have at least 2 episodes of Toji vs Gojo/Geto
One episode of conclusion : Getp becoming gloomy, Gojo becoming stronger and stronger and Geto becoming evil. Gojo/Megumi
So at least 5/6 episode for me