I remember the first time I did this mission, back when it came out. I played solo on Normal difficulty, and I spent more Sparks of Life than I have ever done before...
Now I'm thinking of checking it out as a Radiant farm, but you'd have to go on Elite for that, and I'd burn through all my Sparks in a day trying to do that unprepared. So, any tips for doing this reliably would be appreciated, solo or in a group. I'm willing to invest into some equipment for it as well. Already thinking of getting some bombs and CTR armor with piercing resistance, as I read around that it'd be a good thing to have.
But also aside from equipment, what should I actually be doing? What should I know? Any advice would be helpful, so please, go nuts!
If you search Google for something like "dreams nightmares site:forums.spiralknights.com" (without the quotation marks), then you'll find several threads, such as Guide to farming Dreams and Nightmares efficiently.
Speaking for myself, I usually do this mission solo, and I don't find it very hard. In the first two levels I charge Acheron and use a gun to hit switches. And I skip all of the unforced fights. In the third level, only the final fight is forced. There I run in a loop around the edge of the board, spamming Nitronome or Dark Retribution.