There are several opportunities throughout the game to unlock this trophy, the first of which being in mission two: High Overseer Campbell. At the start of this mission you will notice some guards throwing bodies off a bridge above you. Two the left of those guards is a Wall of Light. Make your way, undetected, to the wall and disable it using the electrical box nearby. Run into the newly opened area and get the attention of as many guards as you can. Once they are chasing you, return to the bridge where the guards were dumping bodies. Those guards will now be chasing you, and should have more than five attacking you now.
With the guards giving chase, Blink you way over the existing wall of light and make your way to higher grounds, and soon you should lose the guards and the trophy will unlock.
Another good location is mission four. Once you reach the bridge, disable the Arc Pylon and get the attention of guards. There are easily more than five here, so once they are giving chase climb/Blink to the top of the bridge. The guards can’t follow you this high up, meaning you can elude them and unlock the trophy.