Yes, rogue could have a 100% chance of success. Obviously their chance isn’t going to get any better than that, seems like an odd thing to bring up as a counter point though.
As for your suggested explanations for the assistance, none of that lines up with it being at worst non-impactful to do a paired group check. The rogue is completely unimpeded by helping the paladin, and in situations where their chance isn’t already 100% they might even have a better chance, since any possibility for success from the paladin could potentially cover a failure from the rogue. If the rogue only fails on a 3 or less and the paladin needs a 19, that raises the success rate from 85% alone to 86.5% with the paladin tagging along.
Even it was a group comprised entirely of equally skilled rogues I don’t think it makes sense to make them more stealthy in groups, which is what this rule does, for the simple fact that larger groups of people are enormously easier to spot.
If the simple fact that literally any pairing of two people is more stealthy then either of them alone isn’t enough reason to not use this rule for stealth then I don’t know what is.
Yes, rogue could have a 100% chance of success. Obviously their chance isn’t going to get any better than that, seems like an odd thing to bring up as a counter point though.
As for your suggested explanations for the assistance, none of that lines up with it being at worst non-impactful to do a paired group check. The rogue is completely unimpeded by helping the paladin, and in situations where their chance isn’t already 100% they might even have a better chance, since any possibility for success from the paladin could potentially cover a failure from the rogue. If the rogue only fails on a 3 or less and the paladin needs a 19, that raises the success rate from 85% alone to 86.5% with the paladin tagging along.
Even it was a group comprised entirely of equally skilled rogues I don’t think it makes sense to make them more stealthy in groups, which is what this rule does, for the simple fact that larger groups of people are enormously easier to spot.
If the simple fact that literally any pairing of two people is more stealthy then either of them alone isn’t enough reason to not use this rule for stealth then I don’t know what is.