Whip for interrupts? it is one way to go, but i found the whip interrupt not to be the best coice and thus would rather stick to other interrupts. Every tankish tree has one elite and one non-elite interrupt, so you can have a maximum of 3 interrupts on your regular hotbar. And, what else do you need?

One builder, two consumers. If you use blade, you might to use two consumers, one being crimson theatre (plus the passive shadow play), the other one most likely being steel palace. When fighting bosses which don’t need that many interrupts, you first of all include stoicism and if two interrupts are still plenty, might add in more of your weapon specific defenses.

As you never need more than 3 interrupts (you’d keep the boss in immunity and would achieve nothig by having more interrupts), you’re free to pick a more useful aux weapon. Many people, tanks included, like the rocket launcher a lot as they gain mobility with death from above plus rocket scients. I personally prefer the chainsaw for its reflect shield and the passive for additional agro.

This looks like an old-school elite tanking setup. Some choices are a bit dubious for me but most are quite sound.

So let’s see. Escalation and Crimson Theatre are essential, i wouldn’t surrender those. The same is true for The Art of War, which
is Blades classical interrupt, with a lot of nice side-effects. In any fight where you need to interrupt, keep this one.
Only for some fights, where interrupting is absolutely not necessary, like the 6th boss in Polaris, Stoicism is the better idea.

Reality fracture i find a bit unyieldy, also this setup now has two consumers with 10 seconds cooldown and no consumer for in between. That’s inconvenient and weakens you noticeably. You might want to look at Consequence or Karma instead. (Consequence has the longer list of bonuses but most Chaos tanks i know prefer Karma. I can’t speak of experience here, as i usually tank Hammer/Blade, which indeed means i have not yet tanked Ankh NM, as i wouldn’t know of a way to do that without Chaotic Pull. )

Provoke is what many new tanks take along and fail with, while experienced tanks go without. Thus i would suggest to dispose of it. Illusion and Martial Discipline are situational, if you fight against a boss which does plenty of damage but doesn’t need many interrupts (read: 6th boss in Polaris, also Machine Tyrant in HR, some more but i won’t list them all), they are actually a very good idea, but if you need interrupts then these defensive abilities have to make way.

Thus on the actives i would suggest something like this:
Escalation, Crimson Theatre (use whenever out of cooldown), Steel Palace (use as consumer when Crimson Theatre is in cooldown) and Karma are always on the toolbar. The remaining 3 slots are filled according to the fight at hand, for interrupting The Art of War, Trial by Swords and Chaotic Pull can take the slots, for defense it would be Stoicism, Martial Discipline and Illusion. As many bosses can easily be done with only one or two interrupts, slot interrupts accordingly and fill up with defensive abilities.

The listed passives don’t convince me, i have to admit. I mean, indeed, Inevitability is a must in this setup, as is Intensity. For tanking, Agitator also is a necessity, but Fuel to the Fire sounds like more than it actually does. It might be helpful at low level tanking, if you loose agro a lot, but when damage numbers go up, it doesn’t cut it any more. Better have some more hitrating and attack rating (all good tanks use a mix of health and AR talismans) and you’re good.

On the rest, some tanks like hardcase, but i personally am not convinced. Flight of Daggers is damage without anything else, which is great for a solo melee DPS, but of no interest to a tank. And Bloodsport i would completely disregard. Indeed, the composition of actives i suggest work best on the target being afflicted, but hey, you are in a group, right? Affliction is something which almost every DD does. In case of doubt, ask your group and you’ll see that somebody else already delivers affliction, so you don’t need to add this reliable but weaksauce affliction to your setup.
Also, if you absolutely need to afflict yourself, take a look at Shoot ‘Em Up. While it seems more conditional (only triggers when you hit with a frenzy attack), your only builder is a frenzy attack. And it delivers noticeably more damage.

Alternative passives to consider:
– Shadow Play. When using Crimson Theatre, that one is a must, the damage mitigation is quite useful and easy enough to keep up.
– Fluid Defense. An elite of the inner wheel, which improves offense and defense. What’s not to like about that?
(Except that in some NM dungeons, you’ll need Contortionist instead. But that’s something to worry about later. )
– Turbulence. You stack up this evade rating in no time with your chose of attacks. But you have to keep in mind, this passive is best used when your gear is still not too great. When your gear gets better, this one hits the diminuishing returns wall. Badly.
– Fever Pitch. Not a “tanky” passive per se, but if your hit rating is a bit lower, your essential interrupt can easily miss and thus get you killed. So if your gear still is a bit lower, this one might be a good pick.
– Hardcase. There are some dungeons, e.g. Ankh NM, where this one actually is very helpful, but in most cases, i personally prefer other means of defense. Still, as there are places where it’s great, it should not be completely disregarded, some places and some gear setups profit well from it.
– Master of Illusion. When using Illusion, including this one sometimes gives a small but nice advantage, although it’s not as useful as Stone Cold when using the hammers defense Stonewalled. Don’t even consider touching Regeneration, which supports Martial Discipline. This one is only when solo, for actual tankwork Regeneration is of no interest at all.

If you ever want to go for a non-chaos tank setup, note the Chaos passive “Breakdown”, as it’s essential on any tank without Chaos in the setup.

The resulting passives combination thus would be:
Inevitability, Intensity, Agitator, Shadow Play, Fluid Defense, Turbulence, Hardcase and replace one of the last two with Fever Pitch if you find that you miss too often.