Drone Herd

I heard that Rogue Drone anomalies/plexes are common in all regions. Also in my region I regularly find drone sites. Sometimes Rogue Drones guard treasures (eg. Radar cans) together with Sansha rats. Usually I ignore Drone sites but this time I decided to try one.
So here is scan result:

and here is initial spawn:

second wave:

third wave:

and the last wave:

Drone battleships hit hard, especially at close distance.
and look at the alloys and salvage I got:


Soon I calculate how much is this worth.
I soloed this site with Dominix in about an hour.