FormerlyHemlock
Hero
The worst culprit is the Stealth rules which are in several locations. Then again they usually spread the Stealth rules out.
I'm a little unhappy with the stacking rules. Crawford has stated that by RAW multiple Paladin protection auras stack. That's absurd. He seems to think the stacking rule only applies to spells. I recall reading somewhere that similar effects do not stack of any kind. Some of the similar effects are DM call. I'm starting to run into stacking rule problems, especially with AC.
At the moment the paladin can easily get his AC to 24. He's wearing +1 plate, a shield, defensive fighting style, and he casts shield of faith. If the paladin also cast shield that would raise it to 29. If he stacked haste, that would be 31. If at high level they eventually stack foresight on him, he would be nearly unhittable. I can't hand him anymore magic items without further exacerbating the problem with an overly high AC. If I build a creature to hit the paladin, he can straight tear the rest of the party apart. It's becoming an issue in encounter design.
Dispel Foresight and Shield of Faith/Haste, costing him his next turn from Haste lethargy. Then Counterspell Shield. None of this affects the other party members at all.
Or just bypass AC and push him off a cliff. Or just accept the fact that the paladin has invested a lot in defense, bypass him, and go after the other characters. Or just crank up the difficulty and rewards. Or a mix of all four.
A spellcasting ancient red dragon should still terrify this paladin, AC or no AC, aura or no aura. Mindflayers and intellect devourers likewise.