Class
This build is a 3 Warlock, 17 Sorcerer build. The path is: 5 levels in Sorcerer (to get the Fireball), 3 levels in Warlock, 12 levels in Sorcerer. The detailed path is:
- Lvl 1: Sorcerer 1 – Divine Soul (+Guidance +Sacred Flame +Toll The Dead +Mage Hand | +Mage Armor +Sleep)
- Lvl 2: Sorcerer 2 (+Healing Word)
- Lvl 3: Sorcerer 3 & Quicken + Twin Spell Metamagic (+Spirtual Weapon)
- Lvl 4: Sorcerer 4 & +2 Charisma ASI (+Minor Illusion | +Invisibility)
- Lvl 5: Sorcerer 5 (+Fireball -Sleep +Haste)
- Lvl 6: Warlock 1 – Hexblade (+Eldritch Blast +Friends | +Shield +Hex)
- Lvl 7: Warlock 2 (+Devil Sight +Agonizing Blast | +Hellish Rebuke)
- Lvl 8: Warlock 3 – Pact of the Tome (+Book of Ancient Secrets -Devil Sight | -Hellish Rebuke +Mirror Image +Misty Step | +Spare the Dying +Thaumaturgy +Prestidigitation)
- Lvl 9: Sorcerer 6 (+Revivify)
- Lvl 10 Sorcerer 7 (+Message | -Mage Armor +Scorching Ray +Greater Invisibility)
- Lvl 11: Sorcerer 8 & Elven Accuracy Feat (+Polymorph)
- Lvl 12: Sorcerer 9 (+Blink)
- Lvl 13: Sorcerer 10 (+Counterspell | Metamagic Choice: Careful Spell)
- Lvl 14: Sorcerer 11 (+Heal)
- Lvl 15: Sorcerer 12 (Warcaster Feat)
- Lvl 16: Sorcerer 13 (+Conjure Celestial)
- Lvl 17: Sorcerer 14
- Lvl 18: Sorcerer 15 (+Reverse Gravity)
- Lvl 19: Sorcerer 16 (Medium Armor Master Feat)
- Lvl 20: Sorcerer 17 (+Wish |Metamagic Choice: Heightened Spell)
Damage Boosting
The large output is based on the use of Eldritch Blast, Agonizing Blast, Hexblade Course, Hex and Quicken. At any round you can couple the Eldritch Blast with Hexblade Course or with Hex. You can also use Eldritch Blast twice in a row using Quicken.
Agonizing Blast (feature): add CHA modifier on each hit of Eldritch Blast.
Hexblade Course (bonus action): you gain bonus to damage rolls against the cursed target. The bonus equals your proficiency bonus. Lasts for 1 minute.
Hex (bonus action): you deal an extra 1d6 necrotic damage to the target whenever you hit it with an attack (for each beam of the Eldritch Blast). Lasts 1 hour.