The 23rd champion since Legion’s release took 139 days and 347 hours of played time and 3056 quests. After AH sales, buying fast flights, garrison buildings, ended up with 74,000 of gold.
Here’s some interesting stats: the ironman leader-board has 9 hunters, 3 rogues, 2 each for Monk, Druid, and Mage, while only 1 each for Warrior, Pally, Shaman, Priest, and Warlock. So plenty of room for your challenge toon to join the party!
When asked which is better for rogue, Subtlety or Outlaw, Ster says “Subtlety has better defense capabilities while Outlaw is a little more fun with Pistol Shot. Regardless of which rogue spec you pick, you better have your core rogue skills perfected, such as melee attack, escape, crowd control, and put Vanish on multiple places on your action bars.” More discussions of subtlety versus outlaw can be found on the challenge forums here: http://wowironmanchallenge.proboards.com/thread/1411/rogue-spec