Rifter - DELTA shards
Total for this world is
Base levels:
Purple - 8
Green - 7
Orange - 4
Quatre gives you:
Purple - 2
Green - 3
Orange - 2
(Much harder to do, probably not worth the time)
Challenges I did gave me:
Purple - 4
Green - 5
Orange - 1
Definitely think some of these look like they're worth doing, at least one of the combo ones just requires you to do the normal route quickly. I wasn't really trying to be quick though, so would need to see which (if any) of the time challenges can be done without upgrades.