Well pretty much what the title says. I'm trying to get slayer of the lifeless on my DK for transmog and i can pretty much solo almost everything else without issue the exception being instructer ras but i think i have a strat for 2 maning him. Anyway it looks like the mechanics for Gothik make it impossible to solo him, I was just wondering if anybody knew a way to solo him as a DK tank. This is all in 10 man naxx btw.
basically hide in the left corner of the room and kill everything that comes to you, eventually the gates come, all the undead adds swarm you, then just kill killing till boss spawns
not sure of the difficulty of this tactic in solo/duo run, but we used to use it at level 80 and did a levle 85 run and it still worked so try it