So welcome to the reader's alot of you may already know this trick this is just for the newcomers in search of producing and easy amount of extra threat as deathknight tank, in any specc.
So here we go a little short basic guide.
[1] Keep your diseases (Blood Plague, Frost Fever) up 100% of the time. These boost your primary damage attacks significantly, and add a non-trivial amount to your tps themselves. Use a mod to track their remaining time (I use "Runewatch", but there are lots of mods that can accomplish the same thing).
[2] Use your highest damage-per-rune attack as much as possible, whenever it is available. Blood: Heart Strike, Frost 2h: Obliterate, Unholy: Scourge Strike.
[3] Use your spec's secondary strikes, talented appropriately, to convert off-spec runes into Death Runes. (Blood: Death Strike, Frost and Unholy: Blood Strike).
[4] Macro Rune Strike into all your Non-Rp attacks so you dont have to worry about clicking it all the time since its one of you main sources of Tps. Here is how the macro should look like when done.
#Showtooltip "your attack here"
/cast "your attack here"
/cast Rune Strike
So for an example if you wanted to apply this to heart strike it would look like this.
#Showtooltip Heart Strike
/cast Heart Strike
/cast Rune Strike
This way you wont have to worry about touching Rune Strike again and its also works perfectly in pvp.
I know its not long or anything special, but i hope someone can draw a little use out of it. Happy tanking everyone :wave: