And, of course, there is always the issue that one should never actually SAY how close on is to being beaten, of course.

It is entirely possible that Discord might NOT have been able to keep shrugging off Sombra's attacks forever, but he would never want to have to admit to that. Better to pretend to be an ultimate chess master than admit that most of the genius plans are a combination of forethought and the ability to seemlessly switch gears and adapt to useful (or detrimental) happenestance, while presenting the image that it was your plan all along.

Palpatine once once described by someone who said he was the master of plan B. I can relate to that; the amount of stuff over the years as DM, say, (let alone command of Bleak Despair) that has had something set up only to neatly fall into place years later form something I'd not considered at the time is staggering.