The first chem determines the main effect yes. The number value of each multipler is different for each effect. For example, a tier 2 mutiplier for the support points is 3x but the tier for endurance is 2x. I split them up like this so i could balance each multiplier for each effect's tier.
This is something that is still being worked on. In the near future, depending on how much people like you will significantly increase how many resource they can bring back to you. That is the first idea rumaging around my brain at the moment.