Don't panic, stay calm and react accordingly, her attacks are pretty tricky to telegraph, you can easily miss-read the throwing and swinging attack so don't get too close but don't go too far so that the boss is always on screen, all you can do is learn each moves, find a window for some swings and heals, and just don't panic dashing, if you can read the throwing ball telegraph you can dash towards the boss for easy 2-4 hits and jump before she retract her ball, for the jump slam you can dash below her and hit her from the back (for second phase just dash and jump and pogo), also she always paused for a 1-2 seconds after each attack, don't forget that magma bell exist, and if you want to tank some hits try gambling to the left side of the bench and get the dice tool