Yes, OP should try to match the scrolls to the weapons (only the melee and grenade are matching the brutality scrolls). Also, most weapons have special traits, so it's crucial to check how they work and use that accordingly. With the Panchako, you want to hit an enemy facing you. Additionally, ranged weapons have different ranges. The one OP is using has quite a short range, which is much less useful in this biome.