[player1]

Still, I think that most valuable part of the chart are those AD/L and Health/L columns, since any other analysis starts from them. How tough is the group and how good is in dealing damage.

From these values you can start any analysis.

For example, archer vs Thorn-Hunter comparasion:

Archer AD/L: 0,07, Attack: 16
Thorn-Hunter AD/L: 0,188, Attack 4

Attacking creatures with defense of 10:
Archer damage: 0.07 * (100+6*3.33)/100 = 0.084
Thorn-Hunter damage: 0.188 * 100/(100+6*3.33) = 0.157

So full thorn-hunters stack deals almost twice damage compared to archer.

But, if player has bowman talent at 3rd level, his archers would have -20% lower leadership needs. So actual damage would be 0.084/0.8 = 0.105. Much better.

There are other factors too. For example archer effective range is 6 tiles, while for thorn-hunters is just 4. So archer will more often deal full damage, and thus be better then Thorn-Hunter if attacking stacks from distance. On the other hand, archer uses arrows, making him deal just 30% damage on skeletons. But from plus size, archer has freezing arrow talent, very useful on stacks with slow speed, and fire arrow talent for more damage with proper training (0.108 damage, 0.135 with full bowman talent).

So anyway, while core of the unit usefulness can seen from those AD/L and Health/L values, there are always other factors.