Need Help With GR5

I have been trying for the last couple hours to beat GR5 stage 3 and haven't been able to even with the same strategies I see on Fastidious' channel and such but they just don't work for me, here is the team I've been using, does anybody have tips/advice to give me? (Valkyra is just to boost my BP affinity)

https://preview.redd.it/53f5x3s7qude1.png?width=2560&format=png&auto=webp&s=82e8f17d531dc4ed80f3cdaab621b8df2920093c

https://preview.redd.it/c5bwhc3aqude1.png?width=2560&format=png&auto=webp&s=fb12c54f7b0d7dabc8e9eae2542e3ab998122d66