How would you build this level 7 Warlock?

So I'm playing a campaign soon and I'm torn between three options. They are all based on Strength 8, Dex 16, Con 16, Int 8, Wis 12, Char 18

1. 2 Fighter / 5 Warlock Fiend

Invocations: Pact of the Blade, Agonizing Blast, Repelling Blast, Eldritch Smite, Thirsting Blade (would this give me 4 sword strikes? 2 from fighter 2 from Thirsting Blade?).

2. 7 Hexblade

Invocations: Eldritch Mind, Agonizing Blast, Pact of the Blade (do i need that?), Thirsting Blade, Eldritch Smite, Relentless Hex.

3. 7 Genie

Invocations: Pact of the Chain, Investment of the Chain Master(maybe), Agonizing Blast, Repelling Blast, Armor of Shadows, Eldritch Mind.

I'm into the idea of 1. but i can see the Versatility of 3. And I don't see how 2 is arguably different than 1.

In conclusion, I'm lost. Any help is appreciated. Thanks guys.