Ok so first you need to max out some good striker, in your case: -Olivia -Blue -Karen -Gardenia (Grass striker pretty good alternative from Brendan) And I recommend max out solgaleo tomorrow for good steel and fighting type

There are a lot of good support and not just 5* Max out based on what you need -Rosa (Sp. atk boost, move gauge, tank) -Phoebe (Crit+attack boost, move gauge, tank) -Skyla (Speed+defense boost, potion) -Torchic (Sp. atk+attack+crit boost) -Pikachu (With his potion refresh sync grid he is very useful in BV) -Hilbert (Speed+attack boost) -Roxanne (Sp. atk,+speed,+sp. defense boost) -Cheryl (Sp. defense+defense+sp. atk boost, hp recovery)

Good tech sync pair that is useful -Koga (Badly poison deals huge damage) -Mew (With his sync grid he can be a dodge tank + debuffer with swift spam) -Will (The more you buff him, stored power will deal huge damage)