Around 29 hours 57 minutes to beat the game. This final boss was tough taking around 2 hours 27 minutes to beat. I went with a mix of gear, mostly focused on taking less damage, larger reaction window and the remaining gear went towards more beta charge and beta attack damage.
The first form is a free kill. Its more cinematic but void of any challenge. I edited out all the deaths after the first form, since you get a checkpoint after that form. I didnt die on the first form. Beta trance worked great to give me some extra beta attacks near the end (it kicks in randomly) and I was able to pin the boss in place while spamming the L1+Triangle move in rage mode form, so that did some great damage. Its also useful to use the overdrive ability right before you execute the triangle finisher, when the boss is down after shooting out the angels. If you dont shoot those angels down you get 1 hit killed no matter what, but can revive once if you have a revival item left. Running out of ammo is very easy since he does this move twice throughout the fight. I seemed to get a refill on my slugs, maybe that came with the revive item when I revived. The reason to use Over Drive before doing the triangle finisher is because it seems to do alot more damage this way (buffed damaged from that move). Also you can get in a few hits before you do the triangle execution for some extra damage. Due to super twitchy aiming in this game I went with adjusting the aiming reticule to the proper height, then side stepping to focus my aim in on the angels. This was alot easier then trying to line up the reticule perfectly.
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