When looking for a chakkhurr riven, esp for eidolon hunting with mirage, you want + or - impact on that riven?

[(PSN)Midcall]

If u have to choose between cc + cd and one riven has + impact and the other has -impact, which one would u choose for eidolon hunting? I assume the -impact one to get the more chance of the 75% bonus when build for radiation ?

[SmallerRidley]

Assuming no other differences, ie. it's just +cc+cd+imp vs +cc+cd-imp, take the latter because it makes the cc and cd stronger.

Also, that +75% applies to that portion of the damage no matter what.  More impact would just be more impact with no changes to the existing radiation doing 75% more.