Is part 3 harder than the first two chapters? I noticed a significant power gap between the enemies at the beginning of part 3 and the end of part 2. Even with the advanced jobs, being around lvl70, and rainbow equipment, I struggle to defeat normal enemies in one turn like I used to. I speak of enemies like the roach girls and kunoichi elves. I'm playing on normal difficulty.
During monster and angel route the game is harder but balanced if you grind a litle and don't play dumb.
When you go on the chaos route (the thing you unlock after doing the 2 other routes) the balance is fucked. That the point where you have a real choice to make.
You can continue playing in normal and need to grind level & job, have a good synergy in your team and be ready for 5-10 turn roaming fight. If you want to do the boss of this route in normal, you probably need to grind 20-40h to have a team ready to end the story.
Or
You can select the easy difficulty and go inside your castle to find a white rabbit offering you a key item called ruler's rules that let you giga nerf the stats of the monsters so you can cruise on the game and boss with the team that you like and some light grinding.
At the end of the day, if you have difficulty in this game it's because you want it to be difficult. So yeah, if you come here and ask why you have difficulty it's probably the answer you are going to get.
In my opinion chaos route is cool and all but it doesn't deserve the 40-50h of grinding you need to invest just to see the end of this story. Do yourself a favor and use the ruler's rules.