[Snake]

I'd rather have it not add damage, but have bonus effects that Black Knight (the class) doesn't have alone.

My proposal's still there above, but below there is how I expect it to work. This would give the class a little more utility, since they don't really need to have damage. And basic hitting/building SKI is not really optimal for tanks anyway, unless they're the 'good ol' (Ghost or Kensei/BK). So just add a few effects per rank, increase the FP costs up by 10, and cooldown up from 3 to 5. There we go, a very thematic 'touche' for a class with no love.

Checkmate (5 round cooldown/3M)
- Rank 1: 35 FP, Bonus damage equal to 50% of your Scaled DEF
- Rank 2: 31 FP, Bonus damage equal to 60% of your Scaled DEF// Knocks the enemy back by 4 tiles, ignoring effects that would stop those.
- Rank 3: 27 FP, Bonus damage equal to 70% of your Scaled DEF// If you're using Heavy Armor, its Armor + Magic Armor is added to the damage.
- Rank 4: 23 FP, Bonus damage equal to 80% of your Scaled DEF// If you're using Heavy Armor, and it is heavier than the enemy's, it will inflict Knockdown. If you miss the attack while your armor is heavier than the enemy's, you are knocked down instead.
- Rank 5: 19 FP, Bonus damage equal to 90% of your Scaled DEF// Inflicts Interference for Rank + 2 rounds if the enemy is under 25% of their maximum HP.

**I'd suggest only having Heavy Armor and weight differences, but since some people go "AH GOD KNOCKDOWN MOST BROKE STATUS EFFECT BUFF POISON", I think this spaghetti of a condition is enough to justify that. Ugh. Also! The reason Heavy Armor is required for most of it to work is that Black Knight doesn't seem to be needing Heavy Armor for most of its antics, and it's ugly.