Heh! Well, this is why we have the Tactician, Iron Man, and now Custom difficulty levels.
How far into the campaign are you?
I completed it yesterday.
I played in Veteran but never loaded a save and never saved during battle either so I guess it's an Ironman Veteran run.
The final Battle is disappointing, I thought I'd face the real threat after, Shining Force I/II style with a big bad demon I'd have to kill twice.
Also, 2 chests hidden behind 999 hp walls was a real dick move, particularly since you're not even going to use them, I spent 11 turns to blow up the walls on one side and Meridian on the other side opening the second one with his aoe claw move for nothing.
Overall, the only satisfying enemies, outside of swarms during the early missions I mentioned earlier were the bosses, the mages in the small pass fight and the ghosts + golems in the crypt (got all the chests)
The Assassin is overpowered, another similar game, Maiden Tactics (it's on steam) has some sneak/hiding mechanics but there is a % of success depending on how far are the enemies and their perception attributes and you're visible once you attacked.
Here, not only the assassin stays invisible, even when in close combat with two enemies and kills one but his dodge is just insane!
Reminds me another tough fight, possibly the toughest was the first floor of the map thieves mission because of these assassins, one in particular in the first room behind the counter.
I tried to 1 on one him with my assassin, and had to bring the ice mage to kill him along with one of the main characters.
The reason why the game is so easy, particularly late game is because the game spams low level units, seriously, even after getting the lizard level 16, you still fight level 6-9 swordmen doing 9 damage at most.
You'd think by then, blade dancers and high level/ upgraded units would swarm us.