Do you have Shingen?
If yes, use her
If no, get her.
Your current line up should work well with Shingen.
Might need to swap the order a bit to make sure you dont get bottlenecked for burst.
How your line up works. Turn 1&2 Shingen triple atk, turn 3-5 Aphrodite's triple.
Usually by turn 4/5 Shingen should be near max burst (and everyone else in your team should be ready for FB). Go Shingen, use PF, use burst accumulation skill, use Saraswati's heal on Shingen, use Saraswati's atk up on your hardest hitter. Hit one more time, and you can full burst with PF