Uber striker with 4-5 attacks per turn (the damage roll kind).
Uber defender, with insubstantial battlemind.
Uber leader, with... umm... well... granting OA's to allies... yea... they'll feel useful
Only uses 1 item, plenty of room in the feats (frost cheese, a nice weapon) and powers (lightning rush), and you can shift the attributes somewhat (not Con or Int).
[sblock the build]
====== Created Using Wizards of the Coast D&D Character Builder ======
Revenant, Battlemind, Academy Master, Archmage
Choose your Race in Life: Tiefling
FINAL ABILITY SCORES
STR 12, CON 28, DEX 12, INT 13, WIS 12, CHA 22
STARTING ABILITY SCORES
STR 10, CON 18, DEX 8, INT 11, WIS 10, CHA 14
AC: 26 Fort: 40 Ref: 32 Will: 39
HP: 217 Surges: 18 Surge Value: 54
Acrobatics +16, Arcana +18, Athletics +16, Bluff +21, Diplomacy +21, Dungeoneering +16, Endurance +26, Heal +16, History +16, Insight +16, Intimidate +23, Nature +16, Perception +16, Religion +16, Stealth +16, Streetwise +21, Thievery +16
Basic Attack: Melee Basic Attack
Basic Attack: Ranged Basic Attack
Revenant Utility: Dark Reaping
Battlemind Feature: Battlemind's Demand
Battlemind Feature: Blurred Step
Battlemind Feature: Mind Spike
Academy Master Attack 11: Learned Boost
Academy Master Utility 12: Refined Recall
Warlock Utility 16: Offering of Blood
Academy Master Attack 20: Master's Surge
Archmage Utility 26: Shape Magic
Battlemind Attack 27: Brilliant Recovery
Wizard Attack 29: Visions of Wrath
Level 1: Death's Quickening
Level 16: Secrets of Belial
Level 21: Ghostly Vitality
Level 21: Arcane Initiate
Level 22: Royal Command of Asmodeus
Level 24: Arcane Mastery
Level 28: Adept Power
Magic Sickle +6 x1
Life Charm +6 x1
====== End ======
Note that i took arcane prodigy at lvl 10, and retrained it to arcane initate at 21.
[sblock The trick]
1) Archmage turns Visions of Wrath an encounter power.
2) Use it though Master's Surge.
3) Miss all targets (13 Int and no impliment*), who are then stunned.
4) Master's surge makes it (save ends), and doesn't expend.
5) Royal Command of Asmodues makes it dominate.
6) You missed with an attack, so you can use brilliant recovery.
7) Life Charm and Unnatural Vitality let you stay below 0.
8) Death's Quickening and Ghostly Vitality give you an extra actions while below 0.
9) Spend 1-2 moves, 3 minors on brilliant recovery.
*Offering of Blood let's you reroll a hit 1/encounter. Archmage let's you recharge Master's Surge 2 times per day, and arcane mastery adds a few more. So while you can't indefinatly dominate someone, you have enough to consider it at-will for combats.[/sblock]