[Chaos]

Earlier today, I ran a hardcapped STR Narcus build (126 Scaled ATK with around 65 Fire ATK, narcus was rustic, sharp and had full upgrade) against a defensive build with 53 DEF (see: 46 scaled DEF), 17 Armor, Rank 5 Indomitable, Rank 5 Know No Pain, and around 25% Fire Resistance.

So while we were testing how powerful r5 Shinken (see: 150% Scaled ATK) was (jury's still out on that, by the way), we saw an interesting trend in attacks:

Normal Attack: 42 Fire Damage
r5 Shinken (Normal Attack): 38 Fire Damage
CS r5 Shinken (Normal Attack): 25 Fire Damage

It seems that despite going in at 150% scaled ATK bonus and/or +25 damage, every boost the normal attack got would deal less damage

From what I've crunched so far, I'm given the impression that either Indomitable and/or Elemental Resistance is applying somewhere that they shouldn't and cutting the damage down far more than it should. Where they apply, however, is something I'm not particularly aware of.