All potential bonuses

The only limitation to this is that the Unique bonus must be a better version of a lower level bonus. So, you can't obtain Decent Hyper Body on Rare pants, no matter what, but you can obtain 9% dex.

I guess you mean, it has to be something that the primary line can have. Cause the first percent stats are on Rare primary, so "junk" stats would never be able to get them if it had to be something that started as junk but got rated higher.