Need help for teambuilding

Hi, not sure how new you are, but your team's looking pretty strong. Fjorm and Ike only need Quick Riposte (2 is good enough if you don't have feathers for 3) to function, and Fjorm prefers it in her seal so she could have Ice Mirror ready. Veronica doesn't need much, something as simple as Speed or Attack +3 in her A-Slot works fine.

I'd work on building different movement teams to help clear the game's general content. Hrid, Veronica, Reinhardt, and a 4th cavalier (Cecilia for example) would make for a solid team.

An infantry team with Fjorm, Ike, Sonya, and Genny would work. Their base kits work fine, Sonya could use Fury and Spd Ploy in her seal to function by herself. Genny doesn't need much, just dazzling staff refine on her staff and atk +3 in her A slot.

Fliers are the hardest for new players to build around but Female Robin and Nino give you a huge advantage. Caeda and Cordelia, or even Palla and any other similar offensive lance flier works to round out the team.

For armors, BK, Surtr, Effie, and any 3rd armor of your choice would be a very strong team. Although there are high end builds they could use, they don't need much inheritance.