Definition/Summary:

Sensorium

• “seat of sensation”
• The sum of an organism’s perception, where it experiences and interprets the environments within which it lives

Tactical

• The techniques for combining and using weapons as well as military units to engage and defeat an enemy in battle
  ATS
  Advanced tactical sensorium

Expanded info:

eight letters in Arachnids

Add/Misc:

Some spider bites can cause hallucinations