Solasta: Crown of the Magister

To get this achievement, create a custom Warlock. Warlock is a Charisma-based caster with a twist. They are great at blasting things over and over again.
Here’s my build for a Ranged Warlock who can switch to melee.
Race: Tiefling or Half-elf.
Standard array: STR 8, DEX 14, CON 14, INT 9, Wis 12, Cha 17
My array: STR 10, DEX 16, CON 14, INT 9, Wis 12, Cha 20
Max array: STR 18, DEX 18, CON 18, INT 19, Wis 18, Cha 20
Gear: Daggers. Component pouch (upgrade to belt, neck cloak, etc) Scholar’s pack.
Background: Either Sellsword or Artist.
The best skills from your class are (in order from best to worst) Deception, Intimidation, Arcana, History, Religion, Nature, investigation.
Patron: They’ll all good, but I like the Hive best.
Cantrips: Eldritich blast, Shadow dagger, (later) Sparkle
1st level spells: Malediction, comprehend languages
2nd level spells: Misty Step, calm emotions
3rd level spells: Counterspell, fly
4th level spells: Dimension door, Blight
5th level spells: Mind twist, Insect plague
6th level spells: True seeing,
Level two: two invocations: Agonizing blast, Eldritch spear
Level three: Pact boon: Blade (Tome if you don’t have a wizard, then take Book of ancient secrets at level 9)
Level four: Feat: Powerful Cantrip
Level five invocation: Thirsting blade
Level seven: invocation: Devil’s sight
Level eight: If my array or Max take Feat: Flawless concentration, If standard, take Ability Score increase +2 Cha
Level nine: invocation: Fiendish Vigor
Level twelve: If my array or Max take Feat: Creed of Misaye, If standard, Take Ability Score increase: +1 Dex, +1 Cha, Invocation: Lifedrinker
Level fifteen: Invocation: minions of Chaos
Level sixteen feat: : If my array or Max take Feat: Eager for Battle, If standard, Take Feat: Creed of Misaye