TLDR: In a fireteam adding negative modifiers didnt improve rewards. Starting with no equipment and no hud and adding further negative modifiers actually made rewards worse. When in a fireteam (tested in a fireteam of 2 with 2 different people), the equipment locked and no hud activity modifier in pinnacle ops works as expected making your reward score go up, however once you start adding negative modifiers the reward score goes down and down until eventually upon adding a 4th negative modifier you finally get back to A grade rewards (i was getting A grade with just the locked equipment modifier).But the second you remove one of the 4 negative modifiers you once again drop in reward score (expected) before you start gaining reward score by removing the negative modifiers, and adding 4 negative modifiers without the locked equipment and no hud just makes the reward score and rewards the same as no modifiers at all. As a side note the other person in my group with me started out with like C grade rewards even with equipment locked and went up to B only when no hud and another negative modifier was active and with a second negative modifier it went up to A grade but dropped to B grade for me.