Ah, okay. Some things I think I should mention:
First, Warlocks don't do much damage past level 6 or so (around when the extra damage from Warlock's Curse stops being large enough compared to monster hp to matter) but they make up for it by having a lot of control effects. Unfortunately Wizards already do this a lot better, so Warlocks are only ever mediocre.
Second, Wizards are primarily Controllers, and don't do good DPS, unlike diablo 3 Wizards- in fact, the D&D class that is most like the diablo 3 wizard is the Sorcerer, but Sorcerers are 2-stat builds and so human sorcerers tend to be bad, since humans only get one stat boost, and Sorcerers lack Intelligence, which it sounds like you want.
Third, a d10 power doesn't really do any more damage than a d6 power. Damage dice size is pretty meaningless past level 3- what's important is your character's damage modifiers, and how many times you can apply them. Strikers want to be able to deal damage to a target multiple times per round, which is why Rangers are considered the best Strikers.
That said, I think this is your best option: Play a Mage, an Essentials Wizard subclass. Either be a Pyromancer or an Evocation Mage, depending on whether you want to specialize in Fire or Lightning/Thunder. Play a human touched by a primordial of either element, but mechanically you should be a Tiefling or Lightningsoul Genasi. There are no rules against reskinning game elements, as long as you do so in a way that makes sense- reskinning a halfling as a half-giant would be a really bad idea, for example. Tieflings and Genasi both have
racial feats that increase their accuracy and damage with elemental attacks, which these builds need to do enough damage to fill the Striker role in a party. (They also need careful magic item selection- read that thread carefully to scrounge every damage bonus you can. Monster HP increases much faster than Striker damage unless you put a lot of work into keeping your damage on par.)
You'll be INT primary, (CHA secondary if you go Tiefling+Fire, STR secondary if you go Genasi+Lightning) with cool element-based spells, and you can MC Warlock if you want, there are some good feats you can unlock by doing so, especially if you're playing the Fire build.