Heroic 25 LK Paladin Question

[ScooterPerpetual]

So I have solo'd the fight on my Monk already with no problem 1 shot it with my gear. So I went in there on my Paladin with similar gear pretty much doign the exacty same strategy besides me just leaving as many adds up as possible (Glyphing Avenger Shield etc) so I could get GC proc's when I get sucked into Frostmourne everything goes fine for a bit then when there is around 10 seconds left something hits me for 1000mil damage, now I thought it could be the spirits AoE things falling but im pretty sure I stood in those on my Monk anyone have any ideas?

[nightfalls]

So I have solo'd the fight on my Monk already with no problem 1 shot it with my gear. So I went in there on my Paladin with similar gear pretty much doign the exacty same strategy besides me just leaving as many adds up as possible (Glyphing Avenger Shield etc) so I could get GC proc's when I get sucked into Frostmourne everything goes fine for a bit then when there is around 10 seconds left something hits me for 1000mil damage, now I thought it could be the spirits AoE things falling but im pretty sure I stood in those on my Monk anyone have any ideas?

You left a drudge ghoul alive.

EDIT: Choice's original guide is here and covers that point along with some other tricks you can do. It's not as "fun" in my books as it was in 5.3, but still very much doable.

[Deleted]

As above, if you leave a drudge ghoul alive whilst going into frostmourne you usually instadie after a few seconds.