Edited for clarification below. 

(1) I assumed he was asking about it going the other direction. Ex: Armanz in Total Guard tries to sheep a toon wearing a Wand.  Will the Armanz get sheeped on a Wand Proc?  If not, what happens to the sheeping?

(2) Wand Procs all the time when using CC skills against opponents in SS or Mercurial, even when there should be no Debuff to reflect.  I got so tired of my Nick getting frozen by Wand Procs off of toons in SS or Mercurial that I put this on the Discord Suggestion Log 2 days ago.  

"If my champion is unable to place a CC debuff due to Stoneskin or Total Guard buffs, then a Wand should not be able to reflect said debuff since there is no debuff to reflect. You need to switch the order of operations on that."   

Interesting, ill have to dig into it some more.  

What did you find out on this?

I'm certain they will say working as intended. Intuitively, I agree.  The wand acts 1st, pretty straightforward.  Now, your sir nick may not like it. But I sure as he'll don't want my wands wasted on all my toons as currently built.

Forgot to ask.  But from recent experience in LA Id lean towards the Debuff gets reflected but if the applier is in Mercurial it just disappears into the ether. 

I believe the game always checks if a debuff is applied 1st.

This makes sense though, no?

Maybe before relics? Do other relics work same or different? I'm guessing wands aren't coded different. 

To me this is how it should work yes.  

I know how it works right now, but how does it make sense to reflect a debuff that is never placed at all?

Your initial answer to the OP was that it should not reflect since it was never placed. Now you are saying the opposite?   

Like you said an order of operations exists, it just so happens the relic is 1st.  Honestly I haven't seen anybody complain about this, not even the crybaby reddit beotches... lol

Your suggestion would be a huge nerf to wand imo, that could cause a major shitstorm.  

Sorry kinda going back and forth based on who is wearing Mercurial in my answers to you and Trips.

My current understanding of order of operations

Debuff Attempt > Wand Reflects > Debuffer receives debuff.

The Debuffer will not receive the Reflected debuff if they are in a set that blocks it.

Wand Reflect will take place if an attempt at a debuff occurs even when the receiver of the debuff is in a set that blocks it.  ( This is the one I need to double check for sure )

Misspoke a bit earlier when I said "game checks if a debuff is applied first", should have said game checks if a debuff is attempted to be applied 1st. 

I use a Wand of Submission on quite a few of my Arena Toons, and I don't think I should be getting Wand Procs in that situation even if it does benefit me.

By definition, you should not be able to reflect a debuff that was never placed.  That is not a nerf; that is a correction of an error.

Pemdas 

Double checked with Grem and the debuff reflect will happen even if the intended receiver is in a set that would block it.