Of course, 7 stars and 6 stars till rank 4 can get more points for Collectives
But, let's say, you need only a few points to upgrade your class collectives
My Tech was about 70 points to reach level 12

So, I ranked up my Vision 4 stars and he helped me. Because I dont have him as 5,6 or 7 (Actually my roster have more than 60 seven stars, 7 ascended, and many 6 stars R5 maxed)


Now, Im at Tech Level 12 and gained +200 block proficiency
👍🏿