-atk +def H!Jakob... So no bold fighting, death blowing, brave bow+?

I'd say keep henry if he's your only copy.
And for jakob, Guard Bow would maximise his defensive capabilitites if you have CC to utilise it effectively.If not, Slaying bow+, Bold fighter and either bonfire or ignis would make a lethal combo

Yeah definitely no bold fighter brave bow build. with -atk you're essentially losing out on 24+ damage every time you attack compared to someone with +atk.
I'd go for a defense build with Guard bow and vengeful fighter instead.