Heroic adventures are annoying to solo with the stupid nightfall modifiers, and they're only on Mercury for some dumbass reason. PvP isn't even an option, because of how bad it is. Doing hundreds of strikes is the only other way to get them. This isn't FUN.
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I grind the strikes for them,my only issue with that is that I think you should be guaranteed two green paradox amplifiers from completion of strikes. Instead of it being down to RNG wether you get one or two.