Strategy. BLOODBORNE: THE OLD HUNTERS #8 - Orphan of Kos Boss Strategy + Kos Parasite Weapon + Final Wrap-up - Duration: 20:42. Kos Parasite . Orphan of Kos is one of the hardest bosses in Bloodborne and he heavily punishes players with passive playstyle. The Orphan of Kos is a highly aggressive boss that is extremely mobile, especially in Phase 2, that can also utilize ranged attacks. Play aggressive.It is advised not to duo co-op against this boss as his health pool will be increased and his move set in phase 2 become more unpredictable, especially his blood orb attack.When fighting him, avoid the beach and fight him in the water as the terrain is less uneven. Mid range will be dangerous and hard to avoid attacks. Lucians_Sword … Stick to his left side (right for you). Hugging his left is the place where you want to be. Be prepared for great leaps and long range attacks. Circle him while attacking and quickly close any …