There is useless part in that walkthrough. You can have 300 health and 100 armor but no matter what Naga will shot eye-laser at you on mid-distance or close and will pound rocks ALWAYS if can see you or not at any possible range to him. The most vulnerable is his torso from tail side, so you may end just running circles around him, shooting and jumping as instead of rain of rocks he will blast floor with fist in fury. If he will keep using only that attack you can esily finish him, but just before he dies back off because wall explosion triggered by Gabriela can kill you too.
Important: don't even try saving the game in middle of the boss-battle, when you load it, boss will be at full health. Same problem is with Ancient One and Nightmare, so save before boss appears or fight is triggered. If not - max health again and your ammo wasted on them won't comeback, most likely you may lose all ammo and boss is still alive that way..
Kill Fanatics before they crouch - when exposed they are very vulnerable and easy to gib but when they crouch they have aimbot accuracy and defence raises so more ammo to hit and kill.
Post edited March 29, 2013 by HenitoKisou