I think you're being really uncharitable here and partly, I'm assuming, I'm annoying you.

I mean, all I have to go on is what you've described here, which is that the strategy that finally worked for you was circling around to his back as often as you could and running as far from the lightning attacks as you could. Plenty of bosses have cheese strategies that involve repeatedly dodging until you have an opening for a swing or two, and plenty involve running away from the boss entirely until you have an opening, and those strategies are typically described as "what finally worked for me" after lots of frustrated venting about how impossible the boss is. Lady Butterfly, for example, is cheesed almost exactly like that.

If you used a more involved strategy, fine, but I can only react to what you're typing here.

(yes, I made a thread about this topic)

Okay, so this is incredibly fucking rude. You just created a whole thread about a discussion we're having, misrepresented what I'm saying while adding additional context that I didn't have at the time, and directly quoted me. Our conversation is now over because I can't trust that you aren't going to continue posting my responses elsewhere, and I'm tempted to delete my entire half of this conversation to prevent people from searching for it and brigading me.

Say what you want about my tone, at no point would I ever attempt to turn other users to my favor in a private discussion I'm having with someone. At the very least please delete the quote of my rationale so this conversation isn't so easily searchable.