Saizo 4*+10

He performs quite well as a bow check with a budget build like Fury/Bowbreaker. I recommend Barb Shuriken+Ignis now that Kaze has been added to the summoning pool but if you just need a cheap build he can become a BLyn check while debuffing the enemy team with his default Smoke Dagger. There are other builds that focus on his debuffing prowess with Watersweep/Windsweep but they require either a 5* Soren or a 5* Joshua/Alm, so they're a bit more expensive.