Like as a casher or farmer or industrialist, how much tech should I be getting? Since this is such a fast paced game I feel like investing less in tech makes sense? What % of max do you recommend?

whatever you do, don't take a techers word that plays in express lol

Regardless of strategy you should be at max tech levels well before the end of set or you are doing it wrong.

+1

Before turn 900 your eco tech should be 90% of the roof