Alpha Rockwell on unofficial on difficulty 8

Basically, it is impossible. Only viable strategy is sword strat, and finding sword in ASA for some reason is MUCH more difficult in comparison to ASE. At least, I had a terrible luck - my best sword is apprentice level. With 500% shotgun on difficulty 8 (max wild level 240) using cactus broth I would always run out of time, wether I use tartare or chili or just fly in tek suit. 500% shotgun would do 231 damage per bullet to tentacles, 37 per bullet to boss.

Thankfully, I use Cybers Structures mod which has a setting to increase boss timer. So I doubled it. After that, I beat Alpha Rockwell solo in 45 minutes without much stress just running around with cactus broth and focal chili with my 500% shotgun. Still finished naked though because both my ghillie suites were completely demolished by balls I have missed and smashing tentacles.

Another thing to note is that I put element in my lightpet but my gear and bullets and foods persisted successfully, I did not loose anything.

Posting this in case someone on their own server also struggles with this fight.