Very hight perception is not required to be chaste. Mimics are only met on Artifact cache tiles. They're avoided if you get your scouting level to 4, which can be done just by pressing the chest button and using up some food.
The game is pretty easy when you learn to make strong builds. I usually put everything into Agility to have it at 12, make Perception 5, Strength around 4-5 and Endurance 5-6. I buy the stat raising gear in the second town. I steal the good armor, better use Diamond Cuirass or Full-Plate, but they can waste your stamina as they weigh a lot. I also steal good weapon and reinforced shield, steal charms, and it's enough to make battles a breeze.
There are various possible builds and slightly different tactics, but they're not so different in the end, pass Stat checks and get stronger, tougher, more stable than your opponent, learn skills to counter their moves.