Wich roll suits me?

so, i´ m indecisive about the gssr roll and i want to hear the opinion from more experienced players. My current team is:
- Saber: Elizabeth, Caesar
- Archer: Tristan, Euryale, Kid gil
- Lancer: Enkidu, Vlad, Cú
- Rider: Santa Aler, Anne&Bony, Martha
- Caster: Nitocris:, Edison, Medea (both), Elizabeth
- Assassin:Emiya, Carmilla, Stheno
- Berserker: Tamamo cat
- Extra: Jalter