Sorcadins are one of the most used and most powerful class combinations (those are linked). They usually go 2 ways:
A Sorcerer that can wear heavy armor (Making Dex a dump stat because you no longer need it for AC). So you start paladin get heavy armor allowance, level 2 for smites, and you get a Sorc who is no longer a glass cannon.
A Paladin who starts as a Sorc for a bonus to Con saves to help concentration, lots of spell slots, and the ability to turn spells into bonus actions or dual heal, or make boosts last longer.
(OR) you want to make a Dexadin, in which case a dip into Draconic bloodlines helps offset the loss of heavy armor (one example).
In both cases your primary stat is now Charisma.
I also usually play a Sorcadin and have several 6/14's gathering paper mites. In my first full play through I plan on a 6/6 Sorcadin to get level 12 which gives me both the Aura of protection AND third level spells (not fireball.. Haste).
A well built Sorcadin makes a melee monster, and I prefer that over an armored sorcerer type.
