How do I fight those beasts?
Heads on vs a small infantry unit (let's make it light infantry as a best case):
a) cuirassiers shoot 2 dice (assume they are 2 wide & 3 deep for upcoming rear support) @ medium range
...light infantry shoots 3 dice (with one hit removed for hitting a large target)...so we are even on the shooting

b) cuirassier charge in...if I stand to fire...(passing cohesion test but let's say disordered previously)...3 dice needing 4s...one hit removed...I need to hit all 3 (although if I hit with 2 I might stall him)

c) cuirassier charge in...if I form square...(again, make me disordered)...2 dice needing 4s...at best I stall him

d) cuirassier hit tactical unit...6 + 1(shock vs inf) = 7 dice @ 3s vs 6 (-2 disordered) - 1(inf vs shock) = 3 @ 5s

e) cuirassier hit square...4 + 1(artillery) = 5 @ 5s (mounted fighting square) vs 4 -1(disordered) = 3 @ 5s (vs shock)...a bit of a chance but barely.

I've cancelled out rear support. I've not included any flank support (assumed cancelled somehow).
So, how do I beat the beasts? Just hoping shooting slows/stops them?