Well that happens a lot, specially in boss fights. I am not sure if it was coded that way, but whenever a monster is on the brink of defeat, it suffers a drastic boost in either its strength, evasion, and or defenses. It does happens, it can't be avoided unless your strength is drastically much greater than his defenses. Also, it depends on the weapon you are using, the body part you are attacking and the equipment in each bodypart.



This is why I haven't dual wielded at all in this RPG Inferno yet, I like being able to land a strong hit with each turn then keep missing and going out of my mind with frustration with Daggers missing, I couldn't stand that. 


Maybe a decrease of 5 MP per level, and keep the increase the same. I'm aware the augment itself is huge as it is. Anymore might be kinda unfair for non strength oriented people. Sorry if my pickiness is annoying.