Unlimited Blade Works: The Guide to the Ultimate Paladin/Sorcerer Multiclass

[Maan]

Sword and Board is not an option unless you're using your spell slots exclusively for smiting.

You need a hand free for spellcasting. Before any one claims "but that's what War Caster fixes". Nope, no it doesn't. War Caster let's you ignore Somatic components. You still need a free hand to access Material components, or if you're using some kind of implement, a free hand for that implement.

You can only cast V, S spells if both your hands are holding weapons.

You can just put your holy symbol/arcane focus on your shield/weapon and material components are taken care of. War Caster it's useful specifically for when a spell needs somatic components but not material ones.