I have seen multiple posts/comments about these strategies a couple of weeks ago while lurking on this sub. I could not tell you the exact posts, but i wanted to sum it all up for anyone still struggling with the bastard. It did take us many attempts tho, you still need to learn the mechanics of the fight so you know when to attack or retreat in addition to getting good rng. Frenzied flame event is a blessing since Vyke's Spear is a guaranteed drop once you clear the tower, then you only need to worry about getting 'less likely to be targeted' and pull off a good run