All potential bonuses

What u mean by
rare primary
rare primary epic secondary
epic primary
epic primary unique secondary
unique primary
??? Wad de meaning
i thot there was only rare epic n unique?
Blue purple yellow

Simple way to understand it:
- Rank A-
- Rank A
- Rank B- (which is as good as Rank A)
- Rank B
- Rank C- (same as Rank B)
- Rank C

Harder way: In the end, you still only have 3 ranks, Rare/Epic/Unique. But those aren't the ranks of the bonuses, they are the ranks of the ITEMS. A fish can be rated first-class rank, that doesn't mean its fin has to be first-class. We just happen to use the same names (Rare/Epic/Unique) instead of pulling new ones out of our asses (like I did, A-/A/B-/B/C-/C) for coherence purpose.