SEKIRO - Lady Butterfly Defeat - Tips to win

Finally took down Lady Butterfly (as first boss). Couple of notes: The second phase (illusions) cannot be skipped, even when not performing an execution (i.e. draining her entire health bar without filling her posture) In the second phase I could not work around her main attack after her throwing glowing butterflies by block or dodge, best to jump away. You'll note that in the second phase I missed an execution opportunity (finisher deathblow), unlike elsewhere there is a second step to execution, so watch for that. I could have avoided her illusion spell all together with one extra attack press. Pretty sure the game doesn't expect you to undertake this fight so early on (with low health, only two health Gourds and in my case no health pellets). I probably should have gone elsewhere and come back later rather than spending far too many hours trying to get through this fight, but I learned a lot about blocking/dodging/etc which should help in the rest of the game.