Shane observed the Smoker Zombies and aside from their deadly smokes that could probably turn them into Zombies if they weren't careful, he felt that they were rather weak. This was especially true if compared to the Steel Zombies a while ago.
As long as they had a working gas mask and avoided being heavily exposed to the smoke, Shane believed that they wouldn't be in trouble against these types of Zombies.
Anyway, Shane watched Lysandra's attempt to clear out smoke… Apparently, each shot from her bow could disperse the toxic clouds while also damaging the zombies.
Kale, on the other hand, held the front line, carefully targeting the zombies' legs to immobilize them before delivering killing blows. By doing this, the Zombies behind them would have trouble moving forward as they were able to block their path.
Shane then used his Stormpiercer Rifle's Adaptive Core mode, firing wide arcs of energy that struck multiple zombies at once.
