Based on the number of resets, this was the second hardest stage for me because I was going for a no-hit run.
Fun fact, there's a mechanic that isn't listed in the stage description and that is every subsequent time Gloomwald's Rage raises its shield, it gains two more sections so that means 10 > 12 > 14 > etc.
I would say the most annoying part about this fight that made it challenging in the first place is how the RNG of its abilities are directly tied into when the next shield phase starts. You're basically hoping for the least obnoxious patterns and that it uses the rapid ground slam combo to delay the next shield phase so you have the greatest attack uptime possible.
Some of the attacks and patterns are truly awful such as:
-The double seed explosion that might require a double dodge and fall in the AoE indicator with their own hitbox before the circle is filled
-The pentagon gate but the vulnerable mob is behind a DoT root zone or when it's not the ones next to the boss so you have to wait or try to take out a shielded one
-The overhead open palm slam that sends roots at you and looks extremely similar to the overhead closed fist slam
What makes a no-hit run possible for Arcane is that her Ult1 basically works like a massive range interrupt so during the shield phases it lets me take out the two farthest shielded mobs and one on Gloomwald's Rage as well.
Overall, I had very good RNG in this run and I'm glad I didn't ruin the opportunity. I didn't even get the root wave attack a single time so that helped save a lot of time! I also found out this run that the push at the start of the shield phase can move you right through the damage barrier without hurting you!
Thanks for watching!
If you're still interested, I also have a two operator no-damage clear of stage 3!
https://youtu.be/rTAonUebZDE