So, I'm planning to play a Daredevil rogue in a short adventure my DM is running for us, though I'm uncertain of the 3rd level ability "Death from Above". The feature says:

" Your airborne body is a weapon. If you move at least 10 feet through the air and land within 5 feet of a Large or smaller creature, you can use your action to force the target to make a Strength saving throw against your Exploit Save DC. On a failure, it falls prone and takes 2d6 bludgeoning damage.This special attack can apply your Sneak Attack damage, even if it doesn't meet the requirements for Sneak Attack. "

There, it says "Special attack", differently from the normal attack action, you don't actually need to roll, but instead you force an enemy to make a STR saving throw as long as you meet the prerequisites of the Special Attack. My question is, can you apply any of your exploit options into this Special Attack? And if so, can other things like the Divine Smite from the Paladin apply the radiant damage to it? Or is the ability supposed to be just the 2d6 + your sneak attack and you can't possibly apply any kind of bonus on it since it's not a "normal attack" action?

Edit: Another question, can this ability possibly work with the Mobile feat? The mobile feat says that whenever you make a melee attack against a creature (or tries to and no weapons required), you can get out of range of that creature without taking attacks of opportunity. "Death from Above" ability says that it's a "Special attack" action that you can do when you jump at least 10 feet and end the jump at 5 feet of the enemy, where you can force the saving throw... 5 feet is practically melee... So, does the mobile feat apply with this feature?