Heavy weapons are needed when faced with hordes of Kryomek - which means all the time! Recoilless Rifles provide precise, long range punch, even against Warmasters. High rate of fire Chain Guns mow down Helions and other massed targets. Usually there is at least 1 heavy weapon per squad of 5 Cyclos. So 3 packs of CYO-1 and 1 pack of CYO-2 provides 3 full squads of Cyclos - ready to mow down the Kryomek.