Wargs have little survivability at the moment. Even in Flayer stance, which focuses on making the warg tougher, there is little in the way of real survivability. A freep with half decent gear can punch through Flayer's defences quite easily. In short don't expect to live very long as a warg if you are targeted and don't have Disappear/Sprint available. Because of this lack of survivability I tend to be an advocate of a good defence being a good offence. Hence the Laurelin Build.
I have recently been using a Flayer build with a focus on morale, critical protection and some extra mitigations thrown in. I have been primarily using this setup in raids. Does it work? Not really. It allows me to survive where I might otherwise have died through being targeted by the enemy raid IF I am spam healed by my own raid in time. In other words it gives my raid's healers a little extra time to help me, but ultimately I am still relying on spam healing, just as I would be if I were using a damage build.
I am probably going to go back to the all out damage setup I used in the past. I am going to be squishy anyway, it is just degrees of squishyness with wargs at the moment, so I might as well have damage if I can't have survivability.
In terms of your rotation I would suggest going with a tried and tested setup:
Shadow Pack (if possible)>Pounce>Crippling Bite>Bestial Claws (Maul if Burger)>Rend Flesh(if available)>Bestial Claws/Maul (repeat)
I would recommend applying a slow to your target as soon as possible; you want the target under control, not running around dictating the fight. Also I tend to Pounce burgers these days. If they burn Find Footing on that initial stun they effectively waste its heal and you can then go ahead and stun them again, all the while hitting them through the +50% Evade buff because of Shadow stance. As for debuffs such as silences, etc I would suggest using them when possible, but don't get bogged down trying to debuff a freep because the whole time you will be taking damage without doing much in return (and of course some of our debuffs aren't great to begin with).