I've beaten it, but I'll say what I said in the other topic.
You’re fighting at least 3-4 different kinds of RNG. RNG is not difficulty, it is RNG. Gear and mods can help weather the storm, but that’s where RNG #1 comes in; with the AI attacking, are they attacks, or bonus attacks. If they’re attacks, you can build TM, but if they’re bonus attacks, you get an infinite loop where you are unable to generate TM and none of your stats matter. RNG #2 then shows it’s ugly head; there is no way to weather an infinite barrage if they target a single character and refuse to relent. But, let’s say you manage to make it through those. Guess what? RNG #3 decides to show up, by stunning Poe, or R2. Then, finally, RNG #4 comes to the party unwelcomed; do any of your exposes land? There is so much RNG to get past that there really isn’t any challenge, or difficulty underneath. Once Resistance gets its ideal turn, everybody admits that the fight is over.
I feel that this could have been done better. Tone down the RNG and find a way to make it an actual challenge, without bashing our skulls against the curb of random chance.