Right now there is no reason to have green AND blue dust, as they are only used for re-rolling properties and that can be left entirely to one type of dust as they both have no use alone.
Once you get to only doing the high difficulty missions and only doing it with grims/tomes you just plain don’t get green dust. It’s silly that I’m sitting with 664 blue dust, 186 orange dust and only 20 green dust and the only way for me to increase that is to go play easier difficulties and ignore tomes/grims, which is not fun and a large waste of time.
Here I am trying to farm out reds, but it’s not even about their power or the coolness of them anymore. It’s just so I can minimize my use of green dust re-rolling.