Dragonslayer Armour is a tough, but managable boss fight. This boss is more intimidating than anything and his shield is actually more dangerous than his axe. When you first walk in approach the boss and roll thorough his jumping attack getting in an attack if you can. Next you will want to bait him into a 2/3 hit combo with two swings of his axe, and then hit him if he doesn’t try to bash you with his shield after the second swing. Split second decisions are a big part of this fight, but won’t generally get you killed if react incorrectly. Keep trying to bait out that 2/3 hit combo getting in hits where you can. Sometimes he will do a 2 hit shield combo and you can dodge this as well and sneak in a hit or two. Sometimes he will hold up his axe and do a long sweeping attack. You can generally hit him a couple of times here before dodging at the last second, as the tracking on this attack is really bad and tends to miss easily. When you get to phase 2, projectiles will start raining down from either side of the bridge.
While this might sound terrifying, it’s really not that bad, and since you are rolling frequently you will generally avoid most projectiles unintentionally. Just keep your eyes open and if you start seeing them land, roll away from the boss until they stop. One last note. Sometimes you will kill the boss and the projectiles are on their way down. They still keep coming and might kill you if you just stand there or are at low health, so be sure to roll or heal immediately after killing the boss. .
As found on Youtube