Like woju's build mentions, if you're going their top path, don't bother, bring other musket units that excel in that. Shenjis are all meant for their grenades which is where all their damage comes from anyway. Shenjis rare doctrine allows you to stay in the fight longer for one more grenade throw, put damage doctrines that are all based on blunt damage on them, as this will increase the damage the grenades do further, eventually getting your shenji up to 1000 blunt damage in their stats. Their other unique doctrines are too miniscule or unreliable to get use out of. (If you don't have the Epic Damage doctrine, don't worry, put in place of it the Purple Blunt damage doctrine (+90).
Increases damage inflicted in sieges by 100. The difference between siege damage and field damage is based on the map regardless of matchmaking or territory war modes.
Increases health by 200. Increases slashing damage by 90. Increases piercing damage by 90. Increases blunt damage by 90.
Increases damage dealt to unit by 120 points. Increases all types of damage by 80 points.
Increases unit's supply of grenades by 25%.
Reduces unit's Leadership cost by 16%.
07/10/2025