It took me a long time to get past monster X on 3HP, but i finally did. Only to get horribly stuck on the core fight.
I still have just my polar star and no booster, because i want 2.0 and the spur. So, naturally, my damage dealing ability is making it an absurdly long fight. I hear other people have used tricks such as rapidly switching weapons while firing, but i refuse to use an exploit in a challenge. Kind of defeats the purpose.
It's been a very fun run so far, but the core fight on 3HP has stopped me dead. The only thing i can really do is play defensively with the level 3 blade and desperately try to survive while trying to coax curly into shooting it. It simply isnt working. Theres always something that gets through Kings blade.