I tried using a Samurai and I found they are too niche for my style of play. The only time they did much as if I couldn't get an archer in range due to limited ranged unit slots. And even then I wished I used a Soldier or 2 cheap single Duelists instead. Even a heavy does better a lot of the time and Samurai are about the same price to play.

Its a pity as the idea behind them is interesting but they are too expensive for what they do. The cheaper options are all better and versatile.