Barracks Spring Cleaning: need IV Help

i need to clear out my barracks via SI and i have some characters where i'm not sure which ones to keep and which ones to ditch.

Some are a mix of multiple 3-4* optimal IV units and some are more iffy IVs that i'm not sure abt

Sheena: +Res/-Atk or +Res/-HP
Merric: +Atk/-Res or wait for a +Spd/-Hp?
Wrys: +Def/-Atk or +Res/-Def
Boey: +Atk/-Res or wait for -HP?
Mathilda: +Atk/-Def or +Spd/-Res
Clarine: Both +Spd, -HP or -Res
Fae: +Spd/-HP or +Atk/-HP (+Atk is already 5* w/ Steady Aether)
Serra: +Spd/-HP or +Atk/-Res (+Atk is already 5* w/ WrazzleDazzle)
Priscilla: +Spd/-Atk or wait for diff IVs?
Nino: +Spd/-HP, +Atk/-HP or wait for -Def
Niles: +Spd/-Def or +Res/-Def