Well, Slarden, U40 is proposing gear that could potentially boost Eldritch Blast damage. The obvious problem is it requires gear shifting, and Slaver's grinding is bantha poo, but here is a potential layout:
Goggles: Legendary Greensteel (20% Acid Crit Damage, 10% Acid Crit Damage, 5% Acid Crit Damage)
Helm:
Legendary Hardened Hide
Necklace: Slavers (Sheltering 45, Radiance Lore 27% (or Resists 14 or 185 Impulse), Heal 22, Quality Spellsight (or Qual DEX or Qual Fortification))
Trinket:
Legendary Symbol of the Slave Lords
Cloak: Cloak of the Mountain - Insightful CHA 9, Spell Focus Mastery 7, Spell Penetration 8, Spellcast on the Run feat, Exceptional 30 Acid/15% Acid Spell Lore set bonus
Belt:
Legendary Burnscar Sash
Gloves:
Legendary Gauntlets of Innate Arcanum
Boots: Slavers (CON 17, Kinetic Lore 27%, Concentration 22, Quality PRR)
Bracers: Bracers of the Mountain - PRR 52, Ins PRR 25, Insightful Spell Penetration 4, Petrification Immunity, Mountain set bonus (30/15 exceptional acid)
Ring 1: Clouded Dreams - Exceptional Potency 20, Exceptional Spell Lore 10%, Insightful Spell Focus Mastery 4, Improved Nightmare Guard (DC 100), Mind Drain (-5% Max Spell Points), -4 Will Saves
Ring 2:
Legendary Spinneret
Armor:
Legendary Coat of the Traveler
Main Weapon:
Morninglord's Sceptre
Offhand Weapon: Legendary Greensteel (Positive Healing Amp 30, Positive Healing Amp 50, Exc Char +2 (or Positive Healing Amp 70 if you care more about self healing))
DPS Offhand:
Echo of the Tome of Strahd - This comes with significant survival trade-offs as you'll be losing 1k temp HP procs, heal amp, on top of the 1 CHA... but if you are in a situation where you don't need the hamp and can afford a 1 CHA loss, this equates to more DPS. Golden Orb of Death also works, though doesn't come with the Spellcraft gains from INT. Though if I were to pick one as a holdover for a LGS item, I would go with the Golden Orb of Death.
There are some small trade-offs: 5% less SP and no 10% efficiency making your belt a bit tighter and some lower saves losing a real DEX item and 14 saves. But for that you'll gain more spell power across the board, more spell crit chance, some nice immunities and procs, and higher PRR and fortification.
Definitely going to need to get off my Warlock's Fey butt and switch to GOO with this.