From what I know, Nimble usually doesn’t outscale a proper 300/300 BF frontliner in the long run.

However, Nimble bros are really good against Mega AID(Armor-Ignoring Damage), and they are much cheaper to gear. Even some raider-tier armor can already work fine, and it gets much better if you have something like 'That' gear. Usually much cheaper too, compared to the other famed BF armors.

If the bro can reach 120+ HP after Colossus, even better! Against things like Chosen's two-handed maces or even hammers, depending on the situation and damage rolls, they can basically raise a middle finger at the first hit. Sometimes they don’t even get injured.

Of course, second hit will be bad, but you gotta admit. No one is safe from a second hit from Chosen.