Which Lance Unit

They all have different utilities. Depending on the other 3 units in your team comp, you’ll have varying answers to this question.

I'd prefer Lancina, but like previously stated, they don't necessrily accomplish the same thing.

Ephraim takes a lot of investment but is the best support lance unit with very good offense too, BLucina idk really what sets her apart tbh (prob the most useless brave hero in my opinion), and Fjorm is a great budget tank with free DC

Ephraim and Lancina are both good buffers, so they would be good to invest into if you run any blade tome mages. I like to run Ephraim with Nino with support, rally def/res, hone speed and the plus attack from his lance and lemme tell you, that's some juicy Nino damage.

Lancina is best with Physical nukers such as B!Lyn, Hana, and Ayra, who can all take advantage of her monstrous +3atk/+6spd (With Drive spd). Ephraim is best paired with bladetome users like Nino and Tharja. Fjorm you can just put her in any team that needs a mage check of some sort.

My neutral Lancina has been a main component of my roster since the first CYL event, the +6 Spd she can give adds a whole new level to offensive physical units by allowing for far more doubles and even quads, adds enormous bulk to others by preventing many doubles, and pushes offensive horse and Flier emblem teams to extreme heights. Her renewal and reciprocal aid build also allows her to heal a decent amount, and a 53/39 offensive spread alongside 33def is nothing to be sniffed at.

Try her out, you won’t regret it!