Dude, I saw that you are very similar to me, you only attack the boss and don't pay attention to his attacks, but honestly this doesn't help you at all in the hard raid because the bosses deal a lot of damage, so what I recommend you do is use a Magma Awake with the Pumpkin Head rank 3 and a Mink V2 to have more locomotion and don't use the fighting style, just use the Magma Awake and the Acro Spear, when you are in waves 3, 4 and 5, keep dashing non-stop and only use the X and V of the Magma Awake, this will help a lot, you can also use the Phoenix Blade V2 rank 3 with Bloodthirsty Stone, this helps a lot. And be careful in wave 2 the boss may not use the skills as quickly but if you fall into one of his combos you're done for.