Best use of Tech Specialist feat

Of the given tables that come with tech specialist, what do you think is most impactful for each option? Sweeping generalizations, I know it can be a case by case basis on what you’re upgrading needs improvement on, but as a whole, which do you think is the best option as a solid, worthwhile upgrade. Or if you have any good experiences with upgrades that did wonders for a character you played/played with.

I think it’s fortifying armor, mastercraft device, enhanced int but this is most dependent on droid you have, improved shields, improved damage.

Same question for superior tech if you want as well!

https://swse.fandom.com/wiki/Tech_Specialist