Ancient Amuletor (UP)

I found the easiest way to get this trophy is to use the gunner and circle the arena using the towers you find most comfortable. You should really only need four towers, the two under and in front of the Pharaoh statue and the two behind those. The latter two will be where you actually fight the Pharaoh, as you won’t have access to any other towers for the boss fight. The boss has a handful of attacks including swipes from either the left or right and a smash attack, each of which you can stop if you shoot the crystals in his hands. There are also unstoppable attacks where it shoots either a ball of dark matter or a rain of dark matter. Both attacks are highly telegraphed but can kill you. For the ball of dark matter simply switch to the tower he isn’t aiming at. For the rain your best bet is to switch between both towers continuously until the rain ends. If you do end up dying you’ll be able to respawn after a 10 second cooldown.

There are a couple stages to this fight, the first ending when the Pharaoh puts its head down for you to shoot. Eventually after this the boss will take off his mask making him vulnerable to attacks throughout the rest of the fight, when this happens concentrate fire on its face as best you can. As long as you are killing the enemies that spawn the Pharaoh shouldn’t be a problem.