I updated my OP for U23. Below is my current picks for U23 equipment, subject to change, of course.
ENDGAME gear: (Lev 28 as of U23):
Head- Mythic Muffled Veneer: (Move +20, Hide +20, Spot +20, Double Strike +9%, +2 Exceptional Reflex Save, Assassinate +4, YELLOW SLOT: +8 CON, GREEN SLOT: +2 insight CON).
Neck- Shield of Ardent: (+18 PRR, Smoke Screen, Fear Immunity, Healing Amp +30%, BLUE SLOT: ???, GREEN SLOT: ???).
Trinket- Epic Litney of the Dead: (+2 to all stats, GREEN SLOT: ???, BLUE SLOT: Good Luck +2). AND/OR Manual of Stealthy Pilfering: (Good Luck +3, Dex Skills +6, Int Skills +6, UMD +5, Open Locks +20, Disabe Devicen +20, GREEN SLOT: ???).
Cloak- Adamantine Cloak of the Wolf (+5 exceptional seeker, 8% dodge, attack +4, diversion 20%). This is borderline useful post U23. Good place for greensteel HP/displacement clickie.
Belt- Epic Belt of Thoughtful Remeberence: (CON +11, Resist +11, Dodge +11%, Greater Regenerate, BLUE SLOT: +2 insight CHA, GREEN SLOT:???).
Ring 1- Ring of Deceit: (+20 to bluff, diplo, haggle, +8 CHA, improved deception, YELLOW SLOT:vitality +20, COLORLESS SLOT: +2 insight WIS).
Ring 2- Consuming Darkness: (Seeker XII, GREEN SLOT: ???).
Hands- Gloves of the Master Illusionist: (INT +11, some useless stuff, YELLOW SLOT: Globe of Imperial Blood).
Feet- EE Sure Footed Boots: (Mobility Feat (+2 to dodge and dodge cap), Balance +20, GREEN SLOT: protection +8).
Bracers- Epic Ethereal Bracers: DEX +11, Ghostly, Deadly 10, Feather Fall, GREEN SLOT: ???, BLUE SLOT: +2 insight DEX).
Eyes- EE Intricate Field Optics: (+3 insight INT, True Seeing, Spot +20, YELLOW SLOT: +8 WIS, GREEN SLOT: +2 insight STR).
Armour- Thunder Forged Light Armour: Alchemical Armour Defense ritual, Fortification 130%, Shadow Killer, From the Shadows, Ghostly, BLUE SLOT: +2 armored agility, GREEN SLOT: Natural Armour +8).
Quiver- Epic Quiver of Alacrity.
Main Hand: Thunderforged Dagger with Touch of Flames, Dragons Edge, Mortal Fear, SLOTS: Caustic Acid, Search +15.
Off Hand: Thunderforged Dagger with Blinding Fear, Paralyzing Fear, Mortal Fear, SLOTS: Caustic Acid, Tumble +15
For DR bypassers, 2 Celestia's works on almost everything needing bypassers. I also carry a good set of portal beaters.