It's vague what the paladin skillset actually is in game - mechanically we get Spirits Within and Circle of Scorn but does that mean we can assume all paladins know how to do that? There are examples of fighters who are explicitly not Sultansworn of Free Paladins using those techniques: In Halatali Hard Mode, you'll face gladiators with sword and shield who use Spirits Without and Bloodstain, moves that are extremely similar but not the same.
Is it possible that the gladiators there received some training, but not all? Spirits and Bloodstain both have charge-up time, whereas paladins can do them instantly. Perhaps that's the important part? Anyone unlearned would take time to unleash such a thing, but a paladin trained in the kung fu style "secret technique" would be able to unleash them instantly?
There's a lot of variables in play. You should be alright to do whatever you choose with the idea, just be mindful that perhaps the Sworn won't be so content to learn a former one of their own is making his own legion of heroes. Could make for an interesting plot point down the road.
Is it possible that the gladiators there received some training, but not all? Spirits and Bloodstain both have charge-up time, whereas paladins can do them instantly. Perhaps that's the important part? Anyone unlearned would take time to unleash such a thing, but a paladin trained in the kung fu style "secret technique" would be able to unleash them instantly?
There's a lot of variables in play. You should be alright to do whatever you choose with the idea, just be mindful that perhaps the Sworn won't be so content to learn a former one of their own is making his own legion of heroes. Could make for an interesting plot point down the road.