[Squeek]

There's no such thing as a 20k Lava Burst.

Glyphed, with full tier 9, against a completely resilience-less enemy with about 3,500 spellpower, MAYBE. In my PVP spec (which has all of the above requirements except for the spellpower) I have never seen more than 13,000.

Now, granted, I do 70k Lava Bursts on Hodir (and boy do I love it when I do) but that has nothing to do with pvp. It's so easy to counter in pvp. You can interrupt the cast, you can silence me, you can dispel Flame Shock, you can reflect it, you can just get some Resilience, whatever. That 13k crit hits for 6k on a geared pvp enemy, who also has 30,000+hp. It's nothing.