I actually quite like the idea of that Leshma, the armoured horses should be more like tanks.
I figure if I'm going to 1v1 a horseman with a sword if it's an armoured horse I should die 90% of the time unless I have a pike, this just isn't the case. I've 1 shot plated chargers with my katana before and yet most unarmoured horses can take 2+ hits unless I get it spot on. Maybe make the unarmoured horses were cheaper, weaker with lower requirements but the armoured horses buffed.