A noob powergamer's first build

Warlock is there for unlimited max level Eldritch Blast

Per tabletop rules, you get max level Eldritch Blast at level 11. (actually 17, but that's far beyond BG3's level cap)

Feats - War Casting/Mobile/Flex

What you need to actually make this build good is ability score increases. Having CHA 20 in the end is pretty much mandatory, and that leaves only 1 feat for something fun.

Hard to say without having all the 5e changes in hand, but even in 5e I'm willing to be you're kinda gimping the character with so many classes. A straight 12 of any of those three classes would probably fair better.

Also note that the racial ability score bonuses are not in the full game. You can choose any race and put the +2, +1 where you want.

Half Wood Elf is kind of whatever for this build. Paladin gets you the proficiencies you need so you're basically taking it for fleet of foot and the stealth proficiency, which are both kind of mediocre when you're building to Eldritch Blast compared to something like gnome.

I'm fine with Sword and Shield Builds, especially on casters, but then there is no reason to take thirsting blade or pact of the blade, as your turn will be eldritch blasting when you're not using slots, the warlock levels are just destroying your metamagic options.

I like the paladin levels cause its a half caster that, if spell progression works the way Larian alluded to, keeps you at the maximum spell progression, but you're not smiting in this build.

2 Paladin/2 Warlock/8 Sorcerer I think works better. You have more sorcery points, you keep the important bits from the two other classes. 2nd Paladin level should come last because it brings the least.

When you make a build you kind of shouldn't build to do damage in two different ways. If you want to Eldritch Blast on your turn, your reaction and likely your bonus action with quicken spell, then why have extra attack?

I don't see how being a powergamer and shooting yourself in the foot by playing solo are compatible with each other. Isn't the point of powergaming to minmax stuff to an insane level? When it comes to tactical efficiency, that would include two things off the top of my head: Metamagic: Twinned Spell on Haste and Fog Cloud used defensively. But neither of these work on a solo playthrough.

These are the most broken things aside from the stealth exploit, but I heard that will be fixed in the full version (cmiiw).

Triple multi-class with a level 12 cap seems weird.

In 5E you generally want to abuse a certain interaction between classes usually with a small dip. Otherwise you just go straight single class, which would net you your 10-12 class/subclass features and an ASI.

Something like a barb dip for rage or a 2 fighter dip for action surge is generally what people do. Also with multi-classing your 5 sorc with 7 half caster level, youre gunna be missing a lot of spell casting.

This setup just seems like you'll be casting EB most of the time. But then are you going to level Warlock first? From 6-10 you'll be pretty gimp until you get paladin/sorc levels and at level 11, your EB will pretty much outscale everything else with AB + magic items.

Dips are usually done super early or super late because the way 5e scales power is not great. So you really delay your spikes hard with a 5/5 multiclass. So like honestly, are you going to enjoy the game being relatively terrible until the very end when your build comes together?

I'd just pick one of the meta things and give that a go like Sorlock. Or just pick a versatile class like bard/cleric/druid and go full lvl 12. For pact of the blade you'd probably want to just go straight Warlock or dip into a martial class for like action surge or something.

It's a cool build, but it's super weak. You're spread to thing. Being melee and caster means you need high Str, Con, and Cha, while using your ASI for feats means you either going miss spells, miss weapon attack, or get 1 shot with low HP. Either go a half caster build with melee or a full caster build with mobility and utility.

MELEE: You're going to want to start paladin for the proficiency in weapons and armor if you are going melee. My suggestion is to go paladin sorc, since in BG3 you can't play a hexblade warlock, which makes pact of the blade fall off a lot. 6-8 levels of paladin for the extra attack and bonus to saves, and possibly a second asi to max out your str and con stats. The rest sorc. Focus on buff spells and utility, and grab warcaster so it's almost impossible to lose concentration. Meta magic: quickend and distant so you can hit people away from you while in melee or BA buff spells while still hitting with your action.

CASTER: For a full caster, the classic coffee lock will run you well. I'd do a 8 sorc and 4 warlock split. As Sorcerers quicked spell+ haste allows for some insane damage. Get devils sight and darkness and just sit inside the dark cloud, blasting people with advantage the moment they enter.

Tha KS for posting an actual build

1. don't split your levels between warlock and sorcerer. Pick one and you'll be much more powerful. 2 paladin 10 caster is strong

Don't dump wisdom completely. It's a very important save.

If you start as a sorcerer you'll get con proficiency, if you start as a paladin you'll get wisdom. Since you're taking war caster which for once actually makes sense as a real melee caster I would start as a paladin. If you want to go dexadin I would do

Str:8

Dex 16

Con 14

Int 8 (headband of intellect sucks, it's a noob trap. There are almost no int saves)

Wis 10

Cha 17

Not sure why you want to wear light armor and take pact of the blade, that's pretty bad if you're taking paladin levels. At least wear medium and lower your dex to 14 and out your wisdom at 14 or something.

Quicken eldrich blast is unbelievably bad when toy can quicken a leveled spell and then cast another.

Mobile is a relatively weak feat, don't take it. You're better off taking ASI

You don't seem to know enough about the game to play it solo. I don't recommend it personally. This is not an insult, it's just my take from reading your lost which so not a power gamer build, it's a role-play build.