Was 4 hard to you? They added an expert mode on top of the 2 difficulty modes, so it can be harder if you want.
Also, as much as I would love this game to get more sales, go back and finish 4 dude. Since this is a remake of the original Etrian Odyssey, some mechanics are different when you compare it to 4, like :
- No overworld (this was toyed with in 3 and properly introduced in 4)
- No alternate dungeons as this was introduced in 4 with the overworld, prior to 4 there was one big dugeon, kind of like the first big one in 4 but just stairs at the end to get to the next stratum with a new theme and new enemies. (exception: Story mode in Untold has one extra dungeon)
- Mechanic unlocked on the mid game for EO3 and EO4:
not present on untold. The devs added the grimore system to fill this void, but is kind of random.
- Floors are much bigger from the get go (since you dont have an overworld to explore).
- The food buffs are still present, but you get them in a different way (in 4, you get them by eating the food found on the overworld)
- Classes are completly different and the skill tier system is not present as it was introduced on 4. Skills can be aquired as soon as you fill the requirement instead of having to both have the requirement and be at least level 20 or 40 for later skills.
So go and finish 4. Restart if you have to.