The only perk skill that almost anyone will argue to always use is heatwave (lvl 20 L) over firestorm (lvl 20 R) because of the zed stumble.įor weapons almost all below the mac-10 (except the trenchgun works really well for scrakes). The R (right side) perk skills are mostly geared towards flamethrowers and benefit zeds getting into medium range to short range. The L (left side) perk skills are mostly for ranged damage and benefit by hitting zeds from across the hall while they come towards you