here's my save, it is edited to have more of the fun starter perks and early mirror stance cause I thought for certain that would be more useful. I am aware that mirror stance pulls heavy aggro (it would be kind of useless if it didn't) I'm not complaining about the head ache this gave me I knew what i was getting into in this instance. I mostly fought bosses with it changed out if I knew there was a way to get their skills otherwise.
Without changing anything on your save except
turning the Difficulty up to max, I walked your party all the way from Khor'minos to the Undermountain waystone, teleported back to Hawkethorne, took a nap and bought some camping supplies, came back, and then walked all the way to the Windy Peaks's waystone (which involved Exploring all the way there since you hadn't been yet on this save). I did actually lose
once to a very unlucky 5x Vulperine Hunter pack in the Peaks, but I was way overdue to camp so that one's really on me (and so I reloaded a save from the very start of Windy Peaks and did the entire thing again, this time without losing, for good measure).
Since you said you WANTED to use Arona, I then went back to Hawkethorne, took a nap, recruited Arona, and then did the rest of the Windy Peaks' map exploration with her (Warhides set) and Passion Priestess Cait. I also swapped a couple of powers out -- I gave you prime target and Assassinate. I wouldn't say this is better, your starting build is actually REALLY GOOD, but I thought it was fun that you both had PT and Cleave to brutalize encounters with. Since the Vulps all have Cornered Beast this probably made things
harder on me, but it was pretty manageable with the occasional Assassinate or Berserkergang pop! Again, pretty easy sweep-through of the area.
So yeah I'm not really sure where your issue actually is coming from. Your build and party comp are both solid (even swapping Arona and Azzy), and is able to merrily wipe the floor with the hardest areas on the hardest difficulty. I could see this maybe having some issues against enemies with a lot of physical damage resistance, but you can circumvent that with weapon buffs (Witch Cait has one in her encounter slot that's HOLY, but you can also just use Naptha/etc.). Proactive consumables use on a weapon-using character is a huge damage boost and I highly recommend it (though I didn't use any consumables for my runthrough of Undermountain and Windy Peaks today).
If I were to seriously change anything it might be to swap a few points of Cunning into Toughness for more HP, but honestly if you're willing to pop Unbreakable proactively as soon as your HP gets low that's not really necessary. You should definitely invest into a stack or two of camping supplies to take with you: having your camping perks and ults available really does make a difference for harder content. Having Witch Cait pop Shield of Light on your tank Turn 1 is a huge survivability boost, but Spirit Veil from Passion Priestess is also good; if you keep Arona, make sure to have her use her Shield Drive asap, since that's even more bonus damage resistance for her. After that it's pretty much just 2x Cleave -> focus down whoever's left at the lowest HP.
