Optimum 4 Character Party Options

[nataben1314]

I've reformatted my computer and so now hopefully can give IA a go (FINALLY!)

I would like to do this with a 4 character party. I have some ideas about what to pick, but thought I'd ask the veteran players for advice first.

So what is the optimum 4 character party in terms of class, race, and proficiencies?

Keep in mind that I am more than willing to use all 4 custom multiplayer-created PCs, I do not need to have any of the normal NPCs in my game.

[Belegur]

There are no restrictions in SK for multiclass human characters. However, bear in mind that this doesn't work if they are already dual class. So, for example, it isn't possible to simply change Nalia to a multi-class mage/thief in SK, as she is already a dual-class m/t. However, you can change her to any other combination, so f/m, f/m/t, c/t or any other combination except m/t are perfectly viable.
It is possible to remove her dual-class status, but you will need another application such as NearInfinity for that. With NearInfinity, for example, her dual-class status is listed as a flag (in this case, former class: thief). Remove this, and she is now a multi-class m/t.