Mello my man...yah gotta review the Hexblade
Since you asked so nicely.
Hexblade: Makes a
solid gish, but makes an exception eldritch blaster. This get's
ridiculous at level 14+. You can be unhittable (19AC + 5 shield + disvatange from darkness + 50% chance to not be targetable from blink + 50% chance to avoid an attack from armor of hex), you'll do tonns of damage (+15 to +24 damage with eldrich blast), and regenerate any damage you do take. That's before adding any feats like inspiring leader.
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Spells
1st
Shield: Great at low level, but with warlocks scaling slots it get's some competition as you level. Still helpful if surrounded at higher levels.
©Wrathful Smite: Frightened isn't bad, except when your already in melee. It completely
fails to scale, so trade it out.
2nd
©
Branding Smite: Minimal extra damage, and a very niche effect.
©Magic Weapon: Modest buff that last for a long time, and scales well. Note this allows blade pact to use a crossbow. At spell level 3, switch to elemental weapon, at spell level 4 switch back to magic weapon (+2 weapon > +1 with 1d4 damage), and at spell level 5, go to elemental weapon again.
3rd
Blink: A strong defensive spell that doesn't require concentration.
©
Elemental Weapon: An upgraded magic weapon with the same nice long durration. As noted, magic weapon is superior when you have 4th level slots.
4th
Phantasmal Killer: Fear at a long range means you can keep someone out of battle, as well as deal some damage.
©Staggering Smite: The best of your smites. Which isn't saying a whole lot.
5th
Cone of Cold: I don't know what this has to do with hex blades, but it's a nice large AoE damage great for wiping out low level creatures, something you might otherwise be missing.
Destructive Wave: About the same damage as cone of cold, but ally friendly and knocks down. You also need to be closer. Both are Con saves.
1: Hex Warrior: Medium armor, shields, and attack with cha. Finally have a good baseline for a gish, though it only brings you up to a baseline.
Hexblades Curse: This is just a bad though though mechanic for a gish. At high levels, if hit something with a sword and you get +6 damage, but if you use eldritch blast, you get 24 damage (plus a little extra from the d10 crits). It also makes for a nice dip for fighters, who can get similar results. Healing is pretty good as well.
6:
Shadow Hound; Another ability that works better with eldritch blast.
10:
Armor of Hexes: 50% chance to be missed against your one target.
14:
Master of Hexes: A major upgrade. Now you can do huge extra damage to everyone, regenerate a massive amount of health, and gain constant defensive bonuses.
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If you remove the hex's ability to work on EB (or scorching ray...), I would say it's black to blue.