[Opener/Tips/Advices] How to play Drk

[Aiio]

snip

Hi OP, I think I understand where you are coming from, since you are possibly looking for DRK openers/rotation for savage based content..?
Anyway, when I think of maximizing DPS as DRK, there are a few things I would like to point out for starters:

Salted Earth
I see numerous DRK players opening by placing Salted Earth down before the pull, or using it as the first skill in your pull. When placing it down so that it is there before the pull, that is inefficient as you are wasting potential DPS on the boss (unless the duration of Salted Earth is shorter than the phase for whatever reason). This is because Salted Earth does have a cooldown, and therefore, when cast, should damage the boss for the full duration of its use. So pretty much use it like any other oGCD skill, to maximize your DPS uptime on target.
If Salted Earth is the first point of damage the boss takes then make sure you are using a GCD to ensure DPS uptime (example would be Salted Earth > Unmend > etc).
Plunge
Whilst it might look and feel cool for your first point of damage skill, it is actually quite inefficient since it has an animation lock and therefore does not allow you to use any other skill until that animation is over, even oGCD (like all DRG jump abilities, etc). Therefore, you should use it inbetween GCD, by itself to make sure you aren't eating away at any GCD uptime.
Scourge
I always try to apply this on the opener, usually as the first or second skill depending on the boss (mainly as second skill in A4S). I don't think I need to explain why you should try have this skill at 100% uptime, or the DoT clipping, etc.

Moving onto the opener itself...

Notes:
DPS combo = DA + Soul Eater or Delirium (depending on MP management)
Enmity combo = Power Slash combo
Just remember, for tanking and pulling, I think it really depends on your group, and whether or not you can afford to only use one enmity combo before changing to DPS combo. Pretty much rule of thumb is you want to be using your DPS combo as much as possible.

Single Target without Shadewalker assuming Grit
I will bold every GCD skill

Dark Arts (<8sec to pull) > Unmend > Carve and Split > Scourge > Salted Earth > Hard Slash > Plunge > Spinning Slash > Dark Passenger > Power Slash > x

As you can see, it follows the basic rule of maximizing GCD uptime, as to not stack more than one oGCD within each GCD.
Now I won't really add what it's like without Shadewalker, because if you afford to pull without Grit then it should also mean you don't really need to use your enmity combo - but the most important and dynamic part of tanking is that where you trade your Enmity Combo for your DPS combo - and this all works with your experience with the group you are with.

I'm not really sure how much further in-depth you would to go, maybe if you have some inquiries on specific encounters with specific party members/composition.
Edit: Oh I also completely forgot about Low Blow since I'm used to saving stun for A4S! And also a comment about double weaving oGCD if you can afford to (since I can't with my high ping I also forgot about that). But also remember animation lock on some of DRK's oGCD are quite long.