Yes Valour is more of a niche filler. I'm currently playing a Bard with a flute and hope to add a blowpipe as a flavorful range weapon (and whip as flavorful melee / mid-range weapon) later. The damage is irrelevant here as a coup de grace finisher for low hp targets or using stun ammo or other control ammo, or if you are silenced and can't cast, then the blowpipe is good. Extra attack helps if you miss the first time. I can stay at 14 dex bcs medium armor helps better than light amor to maintain concentration and can instead put my ability points in charisma or other stats.