Been fiddling with Ioun a bit. Ended up being a busy weekend so apologies if terribad:

Ioun
Level 35 Solo Controller Initiative: +25

STR: 26 (+25) DEX: 24 (+24) WIS: 34 (+29)
CON: 28 (+26) INT: 36(+30) CHA: 26 (+25)

HP: 1264
AC: 49 Fort: 47 Ref: 49 Will: 51
Immune: Illusion, characters under 20
Saving Throws: +5; see also Immortal Resilience
Speed 6, Fly 10, teleport 10
Action Points: 2

Traits:

Phantasmagoria (Fire, Lightning, Cold, Poison, Acid, Radiant, Necrotic, Thunder)
Enemies who start their turn within 20 squares of Ioun takes 15 fire and cold damage, 15 necrotic and radiant, 15 poison and acid damage, 15 lightning and thunder damage

All is Revealed
Ioun’s attacks always target a foe’s lowest defense unless otherwise noted

Standard Actions:
Prismatic Blade (weapon, fire, cold, acid) Melee
+37 to hit 4d4 + 32 damage and Ioun’s choice of one of the following effects: AC reduced by 5, immobilized, or takes 15 ongoing damage (save ends)

Prismatic Wave (implement, thunder, radiant) close blast 5
+35 to hit 2d12 +24 damage and is blinded eynt and knocked prone

Void Bomb (implement, cold, acid, necrotic) recharge 3,4,5,6 area burst 4 within 30
+36 to hit 5d6 + 36 damage and Ioun’s choice of one of the following: -4 to all defenses (save ends), -4 to attack rolls (save ends) or -4 healing surges.

Prismatic Onslaught (implement, cold, fire, lightning, acid, poison) recharge 6
Close burst 20 +36 to hit. 8d8 + 48 damage and 2 of the following effects: stunned, restrained, -3 to saving throws, or ongoing 30 damage all save ends.
Aftereffect: Dazed (save ends)


Minor Actions:

Prismatic Lance (implement, fire, radiant, poison) Range 20
+37 to hit 3d10 + 18 damage and target takes an extra 3d10 damage or grants CA (save ends)

Prismatic Shield recharge 4,5,6
Ioun receives a +5 to defenses against the next Weapon power to target her and if hit, the attacker is blind eynt.

Triggered Actions:

Prismatic Fury: Triggered when bloodied
Ioun uses a Prismatic Lance and automatically recharges Prismatic Onslaught

Immortal Resilience: At-will, when effected by a status
Make a saving throw even if one is normally allowed

Counterspell: 1/round, when targeted with an implement power, Ioun makes a prismatic lance attack against the triggering opponent. If a hit, the target’s power has no effect. If a crit, the opponent becomes the target of its power instead.