Frost Giant FortressThis is simply inaccurate for several reasons. First, Greypeaks mobs AB is 34 so 55-58 AC means you are only hit on a 20 and I am pretty sure that is the highest AB goes outside bosses. However, if you are allowing yourself to be surrounded by two or more mobs, than positioning becomes important when you do not have Improved Uncanny Dodge than Flanking bonuses apply, which may mean you are able to be hit on rolls below 20 (and enemies can land critical hits). The fact you have HiPS and still are having issues with AC that high is odd... My Rogue with 40 AC and Epic Dodge does fine even solo, sometimes using Cat's Grace and Shield Wand to reach a whopping 46 AC. I only tell you this because I think you perhaps need to consider changing tactics because while your build is survivable, perhaps the way you are utilizing the capabilities at your disposal are less optimized and causing problems. I didn't become capable of surviving PvE until I stopped 'beating my head' against the proverbial wall and came to understand the issue was in my approach, not in my build. Athkatlan in this case is probably hurting more than it is helping. While ICE you can 'flip on' after the first flurry out of stealth, Athkatlan cooldown will make it more difficult to manage. Best bet to do more damage with more APR. Or, if you want Athkatlan, use parry mode as it effectively removes the downside of losing attacks (Parry mode will still give one parry per flurry or 3/round).
Frost Wyrms have 38 AB.
Once had two spawn on me at once to boot.
Frost giants had 34-37 AB depending on luck.
If possible, I try to fight 1v1 to gain my +3 duelling AC from swashbuckler.
As for party play and difficulty -
I am of the camp that I prefer easier content when partying to reduce the amount of people relying on round/cl buffs.
I really, really, really hate it when a party keeps casting Haste and Displacement and runs around without RP.
I gave a NWN1 server a try a while back. They balanced their content around parties of 3-5 with constant buffing.
I couldn't find a sliver of RP there outside the people I gave the server a try with, as whenever dungeons came up - people buffed up to high heavens and ran around to maximize their buff's impact. When we tried to do dungeons without Haste and Displacement, we ended up having to go a whole 6 levels below our party of 3 (a wizard, a dex tank, a TWF WM) to be able to avoid dying. Once we got into epics, that plan didn't work anymore either.