It was a good idea, but I learned after that shield pulse is not available to fliers and cavalry. Seems like they really intended to make this skill inaccessible for all the units that need it most.
Est has kind of a weird statline for a melee unit with good res and atk but mediocre spd and def. She has just enough spd that you can give most dragons a really hard time if you invest in it just a little (weapon refine, A-skill, and have a buff ready, for instance), but I've found a different way to do things using shield pulse.
Est +atk -def
Slaying lance +atk or +spd
Pavise
Heavy blade
Shield pulse
Def ploy or atk ploy
Quick riposte
32 res is not high for a ploy, but her targets are swords, axes, and lances, which means one of two things:
- It will land (OR)
- They probably don't have much def anyways (ex: Fir, Caeda, Clair, Eliwood) and, with the exception of Eliwood, their atk isn't that high so you probably don't need it to get the heavy blade off.
Quick riposte is to make sure the shield goes back up if she gets doubled and to help secure KOs. If you don't mind giving it up, heavy blade can go in the seal and she can grab extra attack with life & death. Cutting enemy offense by 50%+5 more than makes up for the defense penalty, as Raven's shield pulse build abundantly demonstrates.
Now the only things she can't tank are arrows and super high-firepower mages
This build also works on Peri, though with slightly less effectiveness due to lower atk.
I would note that this is probably not the most ambitious build for Est. If you count spd ploy as 5 points to her spd, she has 35/35 base offensive stats. She will fail to ploy the Fir/Caeda/Clair types, but those are the minority. So with boon IV, +spd weapon, and swift sparrow, she's already at 40 spd, now add spd ploy and just one goad fliers and she's at 49.