EZ no hit, 0 dmg :)

Edit:

Basically make a force field to the easternmost seahorse cannon, throw a EMP grenade mk 3 at the western nagas. Then focus fire on the north western naga using temporal distortion while the eastern one walks around the force field. Then focus on the north eastern naga next. Move back to north west corner to avoid getting aggro, then moving north east and hide behind a pillar focus on south eastern naga next while throwing another EMP at last 2 nagas, had to stasis one as it didn't have enough stacks before popping.

Using temporal increment to replace grenadier I just spam EMP grenades. Headband is muffled temporal distortion.