Mark the Hopper Demon [BBEG]

[GoC]

Mark,
Hopper Demon

Mark would look almost human if it weren't for the fact he is constantly moving at high speeds, causing his appearance to blur.

Size/Type: Medium Outsider
Hit Dice: 21d8+105 (199 hp)
Initiative: +18
Speed: 100 ft. (20 squares), teleportation
Armor Class: 45 (+10 dodge, +10 dex, +10 insight, +5 deflection), touch 45, flat-footed -
Base Attack/Grapple: +21/+26
Attack: +5 dagger +36 melee touch (1d4+10/17-20)
Full Attack: 2 +5 daggers +36/+31/+26/+21 melee touch (1d4+10/17-20)
Space/Reach: 5 ft./100 ft.
Special Attacks: Spell-like abilities, +4d6 sneak attack, instantaneous counterspell, penetrate damage reduction
Special Qualities: Blindsight 100 ft., darkvision out to limit of normal sight, spell resistance 40, rogue abilities, pocket redirection, energy resistance 10 to all energy types
Saves: Fort +27, Ref +32, Will +25
Abilities: Str 20, Dex 30, Con 20, Int 16, Wis 16, Cha 20
Skills: Bluff +29, Climb +29, Hide +34, Intimidate +29, Jump +29, Listen +27, Move Silently +34, Spot +27, Tumble +34, Sense Motive +27, Escape Artist +34
Feats: Block, Combat Expertise, Counterstrike, Deflect Arrows, Infinite Deflection, Deflect Blow, Dodge, Extra Immediate Action, Greater Block, Greater Two-Weapon Fighting, Improved Block, Improved Initiative, Improved Trip, Improved Two-Weapon Fighting, Mobility, Perfect Block, Quicken Spell-like Ability (Timestop, Heal), Rapid Blocking, Spring Attack, Two-Weapon Fighting, Whirlwind Attack
Epic Feats: Blinding Speed (4x), Improved Combat Reflexes, Improved Whirlwind Attack, Perfect Two-Weapon Fighting, Sneak Attack Of Opportunity, Spellcasting Harrier, Superior Initiative
Challenge Rating: ?
Treasure: Two +5 keen brilliant energy daggers, cloak of resistance +5, ring of universal energy resistance 10
Alignment: Lawful neutral

Teleportation (Ex)
Mark can use dimension door as a move action but isn't prevented from taking actions immediatly after teleporting.

Instantaneous Counterspell (Su)
Mark can counterspell as an immediate action.

Rogue Abilities (Ex)
Mark has these abilities as a rogue of 30th level:
Defensive Roll, Evasion, Improved Evasion, Improved Uncanny Dodge, Opportunist, Slippery Mind, Sneak Attack (but only +4d6 damage), Uncanny Dodge

Penetrate Damage Reduction (Ex)
Mark has a surprising ability to hit weak points in an opponents armor. All his attacks ignore damage reduction.

Pocket Redirection (Su)
Mark can redirect any effect that would harm him to an inanimate duplicate in a pocket dimension. If the duplicate already has a status condition (stunned for example) then Mark cannot redirect that same condition to the duplicate and will experience the effect himself (stunned in this case). If a dublicate is killed a new one can be created by 1 day of un-interrupted meditation.

Spell-Like Abilities
At will—blink, counterspell, quickened heal, celerity, true strike; 3/day— quickened timestop. Caster level 30th;

Tactics:
Mark relies primarily on his speed to make hit and run attacks, and uses his duplicate to allow him an extra action via celerity without the normal consequences.

Block, Greater Block, Improved Block, Counterstrike, Rapid Blocking, Deflect Blow and Perfect Block are from here.
I need two things:
What's the CR of this little devil (I'm guessing 26-27)?
I really need a better name! Mark, while functional, isn't very evil.
Any other comments/criticisms are welcome.

[GoC]

Yes I know it's a cliche and probably looks like a DMPC but could you pleeeaaaassse comment?

[AKA_Bait]

No idea what the CR on this would be.

As for a name... are you looking for a proper name, like Bob or species name, like Bugbear?

Propername: Mark, I dunno why.
Species Names: Reality Bender, seems reasonable.

[GoC]

No idea what the CR on this would be.

As for a name... are you looking for a proper name, like Bob or species name, like Bugbear?

Propername: Mark, I dunno why.
Species Names: Reality Bender, seems reasonable.

I'll take either species or proper name.
Reality Bender?

[Bhu]

Yes I know it's a cliche and probably looks like a DMPC but could you pleeeaaaassse comment?

Im never good at names...maybe Dimensional SHambler??

Luv the Evil Kitty tho...

[Gwyn chan 'r Gwyll]

Species: Hopper Demon
Personal: Fredriech

Why? I don't know. He sounds like a Fredriech. Someone can correct me on the spelling though.

[GoC]

Im never good at names...maybe Dimensional SHambler??

Luv the Evil Kitty tho...

Thanks!
That kitten was my finest work.

Gwyn_ap_Nud: Hopper Demon seems like a good name. Anything on CR?

[BRC]

I have honestly no idea about the CR for this little bugger. Personally, I wouldn't put it below 30. Magic would barely scratch himm, and with an armor class of 45,as well as at-will blink, true-strike (which means that he basically gets +56 to attack (Note, an attack that bypasses armor) if he takes a round to prep, or just preps inside one of those quickened timestops

[GoC]

Ok, since guessing CR is too hard I'll ask another question:
How many non-CO board 20th level characters would it take to kill this 50% of the time?