It all comes down to this. Tonight’s Cavs game vs. the Charlotte Bobcats, against whom they’ve had persistent trouble this season, may be the most important matchup of the season. Every game is critical at this point if they intend to purloin the final playoff spot from the spiraling Atlanta Hawks and the surging New York Knicks (now under the leadership of His Majesty Phil Jackson). Dion Waiters has shouldered much of the scoring burden — sometimes dramatically — while Kyrie sat on the sidelines with a biceps injury, and he’ll need to continue his heroics, as will the finally present Jarrett Jack, Luol Deng and an Anderson Varejao inching toward beast mode against Al Jefferson, Kemba Walker and the Cats. Tipoff at the Q is at 7:30 p.m. (Allard)