Crystal-Covered Crusher
The basic idea here is simple, a Psi Warrior who uses an Artificer dip to become Int-SAD, with Lightning Launcher as its main weapon. You can have a pretty good AC (20 or 21) without tanking your Stealth skill (plate armor, shield, Enhanced Defense infusion). I'm not counting on the Customizing Your Origin rules being in play (and I don't like the ability-score-swapping option), but if these rules are fair game, the Hobgoblin proficiency features become three tool proficiencies of your choice; very flavorful!
Hobgoblin, Inheritor, Psi Warrior Fighter 17 / Armorer Artificer 3
Str 10, Dex 14, Con 14, Int 16, Wis 11, Cha 10
Proficiencies: Athletics, Survival, Arcana, Stealth; customized origin variant: three Tools of your choice.
- Fighter: Archery fighting style; (Second Wind)
- Fighter: (Action Surge 1/short rest)
- Fighter: (Psionic Power 4d6; Protective Field; Psionic Strike; Telekinetic Movement)
- Fighter: Fey Touched feat - boost Int +1 - gift of alacrity & misty step
- Fighter: (Extra Attack 1; Psionic Power 6d8)
- Artificer: guidance & thorn whip; (Thieves' Tools & Tinker's Tools proficiency; Spellcasting; Magical Tinkering)
- Artificer: Enhanced Defense & Homunculus Servant & Mind Sharpener & Replicate Magic Item: Sending Stones infusions; (Infuse Item)
- Artificer: Armor Model - Infiltrator; (Armorer Spells - magic missile & thunderwave; Smith's Tools proficiency; Arcane Armor; The Right Tool for the Job)
- Fighter: Skill Expert feat - boost Int +1 - History proficiency - Arcana expertise; (Psionic Power 8d8)
- Fighter: (Psi-Powered Leap; Telekinetic Thrust)
- Fighter: boost Int +2
- Fighter: (Indomitable 1/long rest)
- Fighter: (Guarded Mind; Psionic Power 10d8)
- Fighter: (Extra Attack 2; Psionic Power 10d10)
- Fighter: Sharpshooter feat
- Fighter: (Indomitable 2/long rest)
- Fighter: Resilient feat - boost Wis +1; (Psionic Power 12d10)
- Fighter: (Bulwark of Force)
- Fighter: Lucky feat
- Fighter: (Action Surge 2/short rest; Indomitable 3/long rest; Psionic Power 12d12)
Spoiler: Typical Artificer Spell Preparations
Show
- (3/day) absorb elements, detect magic, disguise self, expeditious retreat, faerie fire, identify, magic missile, thunderwave