Kill number 26 dropped my first rune but then I got another at 28, lol. I'm to a total of 29 kills and need 2 more runes. On the other hand, I got the tanking trinket pretty quickly. My stats show 5 black night kills but I know I killed him a couple times after I got the trinket. Then I started resetting it after 2nd boss(es) for the runes.

On heroic, I've cleared it 8 times, no tanking weapon and no caster weapons but I did get the tank ring and one back piece.