Linde Bringin' Back da Dagger!

There really isn't much in terms of "uniqueness" when it comes to dagger units, at least from what I've seen.

The 3 main daggers that I usually think about for Linde are Starfish, Smoke Dagger, and Rogue Dagger. One's for offensive purposes (Starfish), debuffing (Smoke), and buff support (Rogue).

The most "unique" build for dagger units is probably the Close Counter + Vantage build. There's a +10 Saizo on my friends list that has

Smoke Dagger+ (+Def)
Rally Spd/Res
Aether
Close Counter
Vantage 3
Drive Spd 2
Close Def 3

Or you could go with Close Counter + Vantage + Savage Blow C and Seal.

Other than that, I don't think there's really much else in terms of creativity.

k here's one inspired by my knowledge of how to build enemy phase Felicia

Linde +spd -res
Starfish+def (or +spd if you're gutsy/use summoner support/give her fortify cavalry)
(positioning assist or rally atk/spd or rally spd/def, anything really)
moonbow or luna (moonbow if using heavy blade)
brazen atk/spd
Quick riposte
Hone cavalry or atk smoke or spd smoke
Atk smoke, spd smoke, or heavy blade

The point is that you can get into desperation range by baiting an enemy ranged unit. With the def refine she should be able to survive a hit from either mage or missile and QR back if they're in the same spd range because her brazen isn't on yet.

I've been long waiting for a dagger-cavalry user for my Gunnthra team and Linde does not disappoint.

Mine is a basic Smoke dagger+ (spd), LnD, and windsweep combo. She's there to help stack debuffs for Gunnthra to nuke with her Blizzard tome.

Spring Catria (with most of her default kit) and a tanky Sigurd are there to round out the team with their massive debuff toolkit.

I run mine (+atk-def) with following build and leaves imo comparable to a good IV B!Lyn except for the bow and unique effects.

Barb Shuriken +spd
Moonbow
Swift Sparrow
Desp
+3Spd seal

BUT if summer weapons really work on the enemy phase I will probably change the build. Nevertheless nice damage output. I have a very similar build on +Spd Legault. Both work wonders combined if combined with Ostia's pulse but it's not needed.