Do not do any scavenging missions. Do not do unnecessary missions
I just finished a Legendary playthrough where I wanted to test if keeping the number of fights to a minimum would help control the difficulty curve. And it did!
. I did ZERO scaveging missions. The amount of resources you get from exploration, missions, haven defenses, lair attacks is more than enough to build everything you need.
. I chose the faction I was going to ally with (Anu) and ignored the others. So I never came to their rescue. Only haven defenses for my ally.
. I traded food for tech and materials. You get waaaaaay more food than you need.
This made the difficulty progression slow down A LOT to the point that the game become easy now that I have all the meta knowledge on classes/gear builds.
So yeah. Don’t to scavenging missions.