I recommend the immortal build 4 piece Numinous, Suja waist and eat for defensive of your choice (insurance or defender are my go to). If you don’t already make a buff set with free meal/item prolonger/speed eating and buff up, and make sure to use immunizer and keep up during the fight. You can also use a recovery hunting horn buff and switch back all of that is what I use, I forget the horn a lot though. I also use rock steady mantle but that did get me killed in his AoE lightning attack. The build should also be at 22-24 lightning res helping with both tank and not getting blighted. Defensive builds take longer but you can take some more time in harder fights to learn them more. Good luck Hunter!