Tried searching , general discussion available but couldn’t find direct answer for my question

Note: this is my first patrol , heaps to learn. engine ZD30 /2016
Gu got ecu= shop ultra boost with hi flow Garrett turbo,

What are the must have gauges
At the moment it has EGR & Boost Pressure , Gauge for dual battery . is this adequate , what to keep an eye on and additional gauges to include