I was doing ambuscade earlier and asuran claws did 2k, 1 shotting August. So next time I put earthen armour up to prevent the 1 shot.

If I understand the move right, if an attack does 75% of your max hp in damage (which would be about 1.5k for August) it reduces the damage by 45%.

But with earthen armour on the asuran claws still did 1.8k, killing August. So does the move just not work or have I misunderstood it's effect?