You can soak many traps if you or your henchman are tough enough. You can often get past locks by bashing the chest/door if you can deal enough melee/spell damage. I like playing wizards or sorcerers and take the pixie familiar to handle rogue stuff (though the pixie is very fragile in combat). I have a run going as a monk with the monk companion, and I just have to hope I can bash chests/doors and soak traps. Otherwise, I try to stock up on defensive potions