So Diablo has "invaded sanctuary" twice now in the game I'm in. I've been to countless super uniques trying to find him and he will NOT spawn... I was in rogue encampment the first time he spawned then went to Shenk to fight him and it was just Shenk. Next I saw in A2 town and went to several other super uniques and no D clone... Has happened to anybody else?

I do a Diablo run and I find him at the first seal pop I do

for guaranteed spawn, if you see anything before "diablo has invaded sanc" stay in town and wait for the last message. Then go to lut gholein, waypoint to "arcane sanctuary" and right above the waypoint, go down the portal that brings y ou back into the palace. He will be immediately there. Try not to be out of town when he is about to spawn.

I always go to Cold Plains to easy cleaning way and operation space to fight. Others go to Nithalak temple via red portal to close combat fight and I once have clone instead Countess in Tower. Always work despite the many network bugs in the game:)