Land Mattress.. This thing needs to be addressed and disputed. It is clearly overperforming, an I-Come-Back button, no skill, no cost when looked at its performance.
When you have to fight against in-cover, in-trench Tommies and Vickers you'll need indirect fire such as Leig. But oh my god that Land Mattress just eliminates the shit out of Leig with no drawback. You also have Here-I-Cummando! in that doctrine too. Zoobee himself is not a great player seriously, he is just constantly abusing this tactic.
https://www.coh2.org/replay/53167/land-mattress-is-paytowin