Steelrising

This trophy is one that could take several tries if you're actively trying to get all 10 done at once as your timing has to be very precise.

As you are exhausting your endurance the green bar on the bottom left of the screen will start to get a slight greyed out effect that will take over the entire bar if you don't stop using your endurance. Once you have completely exhausted all your endurance (fully greyed out effect over the green) Aegis will overheat and release sparks from the gear in the middle of her back. Your endurance bar will get a red line through it for roughly a second before the greyed out effect starts to count back down to the start of the endurance bar.
On the far right of the Endurance bar is a section with two little triangles that section off a chunk of your endurance bar at the end. In order to get a Perfect Cooldown you need to press before the cooldown bar goes past the two little triangles. You have about a second or less between the red line in the Endurance bar disappearing and pressing before the cooldown bar has gone past the two triangles. It took me a few tries to find the rhythym and timing then it was easy to pump out all 10, so be patient and learn the timing or wait till the point of no return and try then when you may have already down most if not all during combat through the game.

It will most likely happen naturally throughout your gameplay, especially if you exhaust your endurance alot. As I chose to start with the alchemy class and the ice batons I didn't really completely exhaust my endurance and found it too risky to be watching the endurance meter to time my cooldown while in a fight. I chose to dodge around in circles by the first Vestal in Gros Caillou and try get all 10 perfect cooldowns at the start as I knew it would be difficult for me to try get them during combat.