Disagree with the max AC on a dedicated fighter, that can still haul ass;
10 + 11 (Chittin FP) + 2 (Ring of Prot +2), +2 (Amulet Natural Armour), 3 (From Tumble, 4 at very very high levels), 1 (From Mage Armour, dodge AC), 1 (Dodge AC, Ench Boots), 10 (Imp Exp), 4 (Haste, dodge bonus), 2 (stack 2 ontop of the ring, brooch of shielding, prot bonus), 5 (Towershield/Chittin), 2 (from Barkskin pots), 1 (+1 dodge AC, from dodge feat)
That's not even taking enchanted gear in to account.
Grand total: 54 AC, without the level 14-15 enchanted gear. Mix that with the fact that saves can be godly and yeah. Also note, that this is following a generic, easy as hell cookie-cutter build with plenty of feats to spare, high reflex and evasion, etc. With the high end gear, you're looking at around 58-62 AC. -- Also worth noting, the build that is rediculously easy to get, can have about +15 or so to all saving throws, add enchanted gear on to that, it's like Russia invading Georgia.
---
That's also the thing Winter, how many people do those dungeons at max spawn and seek out a proper rogue? Not many. Most of the time it's the same stuff getting hit, over and over again at 15-20% spawns. I agree, specialised rogues are good, assuming you have a DM around, or someone who is very open to letting slightly bad stuff happen to their character (not that common). Even then, the existing DCs at the moment are a joke, even without Vardo gear. It's why I'm glad they're implementing the new high-end dungeons.
Also, cross-classed Open Lock, let's take a look.
Take 20 + 1 + 10 (Lockpicks, easy to find if you know where to look), Knock Key (Knock, 50 charges, 1/use), Belt of Locksmith, Gloves, higher dex bonus = cats grace. Total = 37. That's assuming with just -one- skillpoint put in it. Being able to crack DC 70 locks as a level 9 rogue, no real use for it lol.
Also, disable device;
Cross-class, typically, 20 + 5 + 1 + 1 + 1 + 3 = 31, again, with only one rank.
--
Also, from past experience, PCs that can kill things with a bit of ease, typically get the most IG favour. It's very hard to do covert things ICly, as a rogue, unless you OOCly know the player.