So here's an odd question:
Domain strike says: If you make a successful unarmed strike against an opponent, in addition to dealing your unarmed strike damage, you can use a swift action to deliver the effects of the chosen granted power to that opponent...
Destructive smite power says: the supernatural ability to make a single melee attack with a morale bonus on damage rolls equal to 1/2 your cleric level...
So does domain strike allow you to drop a swift action 'supernatural' melee attack on someone? It would be pretty fun to have, say, a raging Ragathiel cleric/monk who could charge with a dragon-style roundhouse kick and then swift-action two-hand the target with a bastard sword.
Destructive Smite's effect applies to YOU. It's a boost to attack rolls.
That's how i originally looked at it too, and that's quite possibly the intent. The thing is, the description says its literally a
"supernatural ability to make a single melee attack with a morale bonus on damage rolls"
instead of a "supernatural ability to add a morale bonus on damage rolls when you make a single melee attack."
What it seems to me to say is that its a single-melee-attack-with-a-damage-buff packaged as a standard action supernatural ability, the way that the fire domain grants a touch-attack-with-fire-dice as a supernatural standard action. It could be just a semantic error/ambiguity. Destructive smite is usually very limited compared to ferocious strike, but this case made me wonder.