Fucked LB rotten. 2nd phase on the first attempt, Ded on the second. For the record, I went in with 6 snap-seeds, 4 health vials, two prayer bead necklaces (extra vit/post), 1 memory (extra attack), and upgraded shurikens (not sure if this made a difference), so it would've been a fair bit harder earlier in the game. Plus I'm further into the game, so have had more combat practice.
Tips for LB: Stay close. Get a rhythm down for your attacks, parrys and dodges. Just playing Swing Swing. Dodge. Swing Swing Swing Dodge. was enough to basically decimate her first form. She jumps up, I throw a shuriken. All dodges are towards her either her left or right side. Stay close and be relentless. Mashing attacks will kill you and this game is as close to Crypt of the Necrodancer as it is to Dark Souls. The fights literally have a rhythm. 2nd phase the seeds helped, but the rest was the same. I was lucky not to see her Orb attack too often, but again, the more on top of her you can stay, the more likely you are to interrupt her spells or keep her on the back foot.
You can do it Swoz!
Anyway, now that's done I can go back to getting smashed in the face elsewhere.