Q.: Can I get a DW Chandelure?
A.: *As B3N/Swaggron said, no, you cannot, as it has yet to be released.
Q.: Is my Curse Stall Chandelure Set viable?
A.: In my opinion, no. As B3N/Swaggron also said, "Minimize is Bannes from Competitive Play". I personally also say no as it is what we like to call "Taunt Bait", or a Pokemon with a Moveset dominanted completely by Status Moves that makes them prone to Struggle when hit by Taunt. In addition to this, Chandelure's Low Bulk and Speed gives it trouble sustaining the Substitute long enough to pull off the Stategy. For these 3 reasons, I say no.
However, I don't think that this Set is intended for Competitive Use, as you mentioned Minimize, and if that is so, perhaos it could work with the right Team Support. All in all though, no.