Lol, I wish I knew how to make the morphine work in Singleplayer of Men of War.

That is very unfortunate. I really like CTA but I am baffled by its removal of features from AS2.

What would these items do?

But on a serious note, this game doesnt need repair kits and morphine because both features are baked into certain unit capabilities. Engineers are the repair kit and Medics are the morphine.

Well, you could make something similar to Soliders of Anarchy boost drug, which makes soldiers have almost 2x HP.

I definitely disagree. Morphine and Repair Kits make the game far less tedious and more fun when you're playing in singleplayer. For a casual player like me my game is often times ruined when I lose my last medic or engineer. It also sucks that shovels/free-placed sandbags are gone too.