Shield Brothers felt like it tried too hard. Both bosses can easily be countered just by always moving. Only time it gets bad when there is Solar Burn. Darkblade, on the other hand, is amazing. You jump into the pit into complete darkness and you can't see anything. You fire at his shape, and he disappears. The enemies aren't too difficult but they are still challenging. The boss is random, teleporting around the room and slamming his axe down on you. He should be an example to future strike bosses. A sense of randomness to them, not the same pattern every time you do the strike. They should be intimidating, yet still make you feel like you can win. Constant easy enemies at all phases of his health (cough, Wretched Eye, cough)