Here's the version of the wight I did. Remarkably similar to Cleon's except for the feat selection.
Mystaran Gargantua Wight
Gargantuan Undead
Hit Dice: 32d12 (238 hp)
Initiative: +4
Speed: 60 ft. (12 squares)
Armor Class: 19 (+13 natural, -4 size), touch 6, flat-footed 19
Base Attack/Grapple: +16/+41
Attack: Slam +26 melee (3d6+19 plus DC 35 Fort save or die plus energy drain)
Full Attack: Slam +26 melee (3d6+19 plus DC 35 Fort save or die plus energy drain)
Space/Reach: 20 ft./20 ft.
Special Attacks: Create spawn, energy drain, trample 3d8+19
Special Qualities: Darkvision 60 ft., undead traits
Saves: Fort +10, Ref +10, Will +19
Abilities: Str 36, Dex 10, Con --, Int 11, Wis 13, Cha 15
Skills: Hide +35, Listen +39, Move Silently +43, Spot +46
Feats: Blind-Fight, Cleave, Great Cleave, Improved Critical (slam), Improved Initiative, Power Attack, Skill Focus (Listen), Weapon Focus (slam)
Epic Feats: Devastating Critical (slam), Epic Skill Focus (Spot), Epic Toughness, Overwhelming Critical (slam)
Environment: Any
Organization: Solitary, or pack (1 plus 2d4 wights)
Challenge Rating: 13
Treasure: None
Alignment: Always lawful evil
Advancement: 33-48 HD (Gargantuan), 49-64 HD (Colossal)
Level Adjustment: -
COMBAT
Mystaran gargantuan wights attack by hammering with their fists.
Create Spawn (Su): Any humanoid slain by a Mystaran gargantuan wight becomes a wight in 1d4 rounds. Spawn are under the command of the Mystaran gargantuan wight that created them and remain enslaved until its death. They do not possess any of the abilities they had in life.
Energy Drain (Su): Living creatures hit by a Mystaran gargantuan wight's slam attack gain one negative level. The DC is 28 for the Fortitude save to remove a negative level. The save DC is Charisma-based. For each such negative level bestowed, the Mystaran gargantuan wight gains 5 temporary hit points.
Trample (Ex): A Mystaran gargantua wight gains a trample attack. It can trample opponents smaller than itself, dealing 3d8+19 points of damage. A trampled opponent can attempt either an attack of opportunity at a -4 penalty or a Reflex save (DC 39) for half damage.
Skills: Mystaran gargantuan wights have a +8 racial bonus on Move Silently checks.
Regards
Mortis