Changing my perspective, I'm actually enjoying tactician mode now.

It's a mode where you do whatever you can to not win fights but to beat the game itself.
You need to know exactly where to go to make the early game easy (Houndmaster Crossbow + Ancient sword + Migo stuffs + extra magic loots OP) and once you have all the gears, it becomes a game of manipulating the map to manipulate the AIs. The game is still fun and challenging in its own way as long as you avoid using game breaking exploits like "Side-line Mage" and "Infinite Turn".