I actually did this first try on ascension 15, but maybe i just got lucky to find 2 prime volts and carboard shield. Knight is also probably on second place of strength gaining potential
you just have to be slightly expierienced with brickbattling to beat this game it dont even matter how strong your sword is because almost every enemy walks the same speed as you and cant hit you from the same range
1st tried it, still shocked that I've done so. Only real hits that removed part of my block were around 4 on droids HQ (Did not get to skip laser grid sadly) Ranged weapons carry hard. Killed most of the hunters that could've taken out my block & safely pulled aggro on certain droids like Xero. Icing on the cake was getting circuit breaker, one of the easier bosses
Funfact, I did 37 attempts. First one I used to do this challenge was elementalist. After doing that, I moved on to airborne, Tried to get a bunch of ranged weapons to just beat the entire run with ranged weapons. Failed at that instantly, next was berserker. A friend told me to use it so I did, It was actually pretty good. You can shred the dark one insanely easy as berserker. Too bad that even with overwhelming odds and strength. I still get hit since Hunter droids are stupid. Oh yeah in one of my berserker "No hit runs" I almost did a no hit run as berserker. Got up to Droid Hq one of the rooms decided to give me 3 3.0 hunter droids. I killed 2 then got cocky and tried to melee the last one. Ended up getting hit, Since I was so far, I proceed to just complete the entire ru nto add to my wins. Though I took zero damage throughout the rest of that run. All I needed to do was just use one of the 2 blasters I had. After that, 1.6 would arrive. I beat the game 1st try as knight, the no hit challenge was at last, finally complete. Put to rest completly. (Too bad JEI made it so crown of O's is now just an item, At least I get the exclusive item, Fake Mustache)