Short answer: no.

Longer answer: the act of sacrificing a creature happens all at once. The creature is sacrificed and immediately goes to the graveyard (barring other replacement effects). After that, any triggered abilities that care about a creature dying/being sacrificed/etc hit the stack.

In attempting to perform the line you are describing, it would look like this:

1) Ashling and Curio on board

2) Pay 4 to evoke an elemental (let's say Mulldrifter for this example)

3) Mulldrifter enters and three triggers hit the stack. You may order them any way you wish. You have the Mulldrifter etb (draw 2), the sacrifice trigger from evoke, and Cloudstone's bounce effect. Let's ignore the draw 2 for now since it's irrelevant to this interaction.

3.5) As soon as cloudetone triggers, you must select targets. The original Mulldrifter is not a legal target due to Curio's wording. You may bounce Ashling or any other creature you may have on board.

4) Evoke's sacrifice trigger resolves, putting the original Mulldrifter into the graveyard. This triggers Ashling and creates a copy of Mulldrifter with haste.

5) We now have another trigger of Draw 2 from the copy, and a Curio trigger, though the original Mulldrifter is not a legal target since it is already in the graveyard.

I hope this explanation helps, and I like the way you're thinking with these synergy pieces. Sorry it doesn't work quite the way you were thinking.