trying again to make a creature

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still trying to create a monster for my campain. a boss figure for a mage guild. a corrupted official. decided to turn away from what i originally had and desided to try a lich. so modding some abilities from the players handbooks and monster manuals i put this together. i wanted him to have abilities from sorcerer, wizard, warlock, and swordmage. also want him to be really hard for my group of 5 lvl 11 players. please opinions would be well appreciated.

kaznavec     Level 14      Solo      Skirmisher      (Leader)

Medium Shadow Humanoid (undead)XP 5,000

Initiative +15Senses Perception +15
HP 700; Bloodied 350
AC 28; Fortitude 26, Reflex 29, Will 24
Immune disease, poison; Resist 10 necrotic
Saving Throws +5
Speed 6
Action Points 2
m dual lightning strike (Standard; at-will) ♦ lightning, teleport
+19 vs AC 3d6+6 teleport up to 8 squares and make a secondary attack, 3d6+6
r horrifying hatchings (Standard; recharge 56) ♦ poison
range 10 +17 vs fortitude 4D8+6 and ongoing 10 poison damage (save ends) when ever the target takes this damage you can slide the target 1 square
a dark energy fire ball (Standard; recharge 6) ♦ fire necrotic
area burst 3 within 2 +17 vs reflex 4D10+6 fire and necrotic damage
c forced move (Standard; recharge 56) ♦ force
close burst 3 3D10+6 force damage and you push the target 3 squares.
second wind (Standard; encounter) ♦ healing
kaznazec spends a healing sure and regains 175 hit points and gains a +2 to defenses till start of next turn. you gain a +3 to damage rolls till the end of your next turn.
M sword strike (Standard; at-will)
+19 vs AC 1D10+6 damage
r dominate the weak (Minor; at-will) ♦ charm
range 5 +17 vs will the target is dominated till the start of kaznavec's next turn. only one creature can be dominated at a time.
soul drinker weapon (Free; encounter) ♦ necrotic
trigger: you hit an enemy with this weapon, effect: you deal an extra 2D10 necrotic damage. if the target isnt reduced to 0 hit points you take 2D12
boots of blood (Immediate Reaction; daily)
trigger: an enemy bloodies you effect: you shift your speed
necklace of keys (Minor; daily) ♦ teleportation
if your grabbed or restrained you can teleport 5 squares
deceptive veil (Minor; at-will) ♦ illusion
kaznavec can disguise itself to appear as any medium or large humanoid. a creature can see through this disguise with a successful insight check vurses kaznavec's bluff check

Alignment UnalignedLanguages common, deep speech, abyssal
Skills Arcana +19, Bluff +15, Diplomacy +15, Insight +15, Intimidate +15

Str 20 (+12)Dex 22 (+13)Wis 16 (+10)
Con 20 (+12)Int 24 (+14)Cha 16 (+10)
Equipment runic cloth armor lvl 13 +3; soul drinker broadsword lvl 14 +3; boots of blood lvl 16; necklace of keys lvl 13 +3; banquet ring; 5p 80g 25s