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Who to fodder Steady Breath to?
Finally managed to pull a Brave Ike from the Hero Fest after over 100 orbs. He has completely neutral IVs, and I'm planning to replace my current B!Ike (+RES -DEF) with him. I have a few options to fodder for Steady Breath.
Black Knight (+1 Merged)
I currently run him on a team with a Distant Counter Amelia, BladeTome Winter Tharja, and Brave Lance Effie. His current slot skills are Fury 3, Vantage, and Fortify Armor. His special is Black Luna, of course, and his sacred seal is SPD+3.
Y!Tiki (+DEF -RES)
I use her on a dragon team consisting of Ninian, Myrrh, and Halloween Nowi. (I really only use H!Nowi for her Hone Fliers boost on Myrrh and guidance mobility.) Her slot skills are Fury 3, Quick Riposte 3, and Threaten Atk 3. She also has a +3 speed sacred seal.
Who's the best choice?

Fate Grand Order
Dragonball Legends
IV Calc
Heroes