Originally Posted by
Maxweii
First there is a thread stickied here that's for stuf like this, I think it's Fix My DK DPS v2 now. Might get more attention there, though unless a mod merges it now you're already here so I'll help a bit
I am phone posting, and world of logs doesn't like phone browsing too much but I was able to see plenty wrong.
He's not using Soul Reaper at all on some fights, the ones he is using it he's getting fairly few casts. On darmac for example that fight has tons of time with the bosses sub 35%, yet he didn't have all that many casts. Now and then he casts Blood Boil, which especially as a 2h frost dk he should never be doing.
He very very very rarely casts anti-magic shell. It's so rare he has the buff from bloodlust more then he does AMS. It's a defensive CD as well as offensive because of the runic gain, so he's missing out on a lot of free damage from it
That's all I can really say on phone, but those alone will account for a lot. Soul Reapers one of our strongest attacks for its costs, AMS use can net you tons of free damage over the course of a fight, and BB is just plain not used by frost DK's.