Let's add in block skill. Since you listed copper (I think you mean bronze) armor then you are trending toward melee combat and you may have some issues with parry skill on the bronze buckler. Perhaps consider an initial approach in a new biome where you use lighter weight armor like troll armor and range weapon tactics until you can build that next level of heavy armor and parry with the iron buckler. Light armor may be more squishy but will drain stamina less. Plus the troll armor can give your sneak skill a boost and that can also help you approach and snipe those swamp spawners.