Deck Knight~Interesting...very interesting. Of all the stats you analzyed, which one seem to be the most tank-ish?
Well, AJC's was the most overpowered in the last version, done as usual by scrapping an attack stat you don't want to use and pumping up the other stats, which is legitimate if you're responsible like Gamefreak was with Skarm and Weavile (to an extent), but I find it blatantly offensive to my sense of balance.
Of the spreads that I didn't cringe at in the analysis (setting aside my own for obvious reasons), eric the espeon's could be quite overpowered with Bulk Up in its original carnation, now it's a more viable candidate for Band or Scarf usage.
Rhykune's is the most naturally all-purpose tankish overall. Both of its defenses are solid with just HP investment. 110 Attack and 70 Speed is less prone to Band/Scarfing, but it will be quite a force with Bulk Up.
My spread is designed to be an exculsively physical tank. I tried to engineer it so that after a Bulk Up it would be incredibly hard to crack physically, but would still be counterable by a decently powered special attack.
The attack that might push it over the edge in power is actually Shadow Sneak. After a Bulk Up Max Atk Shadow Sneak can OHKO 0/0 Azelf with max damage, but with Life Orb, Stealth Rock, or any kind of boost or residual damage at all it could take out the pixie 100% of the time. That doesn't bode well for Gengar or Mismagius who have inferior defenses.
If it isn't Adamant though, Gengar can barely survive Max attack Bulk Up Shadow Sneak, IF it hits minimum damage or therabouts. Azelf can be OHKO'd by Max damage. Dusknoir has the problem of Shadow Claw against it.
So basically most of the would-be Psychic or Ghost counters don't work bar Cress since it gets 2HKO'd after Bulk Up and is faster. This leaves its biggest counter as flying types. Staraptor and Togekiss both fare well against it, as does Skarmory. Air Slash Crobat will also stop it. In fact, Crobat does a pretty good job LOLing at this anyway since it's bulky enough to take a hit and fighting moves are 4x resisted. Acid Armor Muk could also cause it some problems unless it gets EQ. Shadow Ball Weezing counters it as well.
Really, defensive poisons and flyers will be the main counter to this unless we give it a huge movepool. Weezing pretty much shuts it down unless we give this thing Psychic for some reason.