Hey can I get some help with the "strange" monstrum boss fight you get at the start of chapter 7? Hes kicking my ass.
You probably need to level up your character some more. Can't remember what level I was when I beat him, but I am pretty sure I was level 50-60ish when I did.
Craft higher level gear, if you haven't already, from Memoria or Mado(?).
The Bright Sabre (I, II, and III) was a pretty good weapon that I used for the whole game.
Try using the Sensitive Heart accessory, +40% evasion is pretty nice.
If you have them unlocked, try using some of the defense/attack buffs on yourself.
Use the Fire skills, some of them have a pretty nasty DOT (damage over time) they can inflict on enemies, then switch to your TP melee attacks. There is another item/weapon (or skill I think) that can apply a poison DOT on them as well.
Equip multiple Engrams of the same type (if you aren't already), the higher level ones add bonuses to stats and they do stack with each other.