Fjorm

Those with miracle, I guess.
Healers need razzle dazzle,
No body uses pavise and co

Shield pulse was basically meant for her.

Question already asked like 3 days ago

I think keeping/merging Fjorm is the better idea, because there will constantly be quests with her, and she will always return as Arena Bonus Unit, So having a better Fjiorm is a plus.

End even if you really want your Fijorm gone it may be better to fodder her of for ATK/DEF Bond, as many units can make use of it, and Shield Pulse is really niche, and only a few units can make use of it.

Patience is also a option.
Keeping your fooder for now may help you, as Book 3 is about to start, and we will get more experimental characters like Flora which may be able to use shield puls

If you search "shield pulse fodder" on this site you'll find some interesting results including a suggestion someone made with heavy blade + pavise on infantry Ephraim which blew my mind a little.

It also works on Karla in pretty much the same way it works on Raven.

The other uses I've come up with are A.Tiki and M.Grima as player phase bruisers:
prf
(some assist)
Pavise
Heavy blade
Shield pulse
Atk smoke or def smoke or whatever you want
Deflect melee

You start the battle with 1CD until your shield charges. Attack, and it's up and running. Take a hit with it. Take a second hit, and deflect melee kicks in. You're now at 2CD, so you can repeat the process.