Most shield wall builds aren't using Nebuloch and the ones that are aren't using it with Amor Mandragora and Bearcry technology.

You can make endurance charges on demand with Ferocious Roar + Enraged Warcry (being in bear form generates endurance charges from rage spent) and consume them to guarantee critical hits with Shield Wall via Nebuloch, letting you scale your crit damage bonus to the moon.

This build plays best on Smith of Kitava due to its ability to solve defences at a much lower opportunity cost than Titan, giving you more room to scale speed and damage along with other nice bonuses.

Moba: https://mobalytics.gg/poe-2/profile/bold-gun-os7n1k/builds/0798b591-9014-4bf3-8c37-36ca37fb153b

PoB: https://pobb.in/7OeRAPWuxc5Z