Scatter grenades have never ever been good in D2, they are inconsistent and weak. Any exotic that grants an extra melee or grenade is useless for warlocks. You can make some builds with them but they are nothing compared to the ones that actually buff your abilities. You can run double hand held with nothing manacles but contraverse hold is still far better because you get armor while holding the charge. You can run the exotic that grants 2 melee’s for double stasis melee’s but there are far better options like the necrotic grips that actually deals more damage or ophidian aspect for increased melee range and faster handling. Just skip nothing manacles, there is nothing special about them, just another exotic ready to collect dust.