Destro gets to the point we're you can use GoSac again.
If you just love having your pet, that's great too! Honestly, use which ever one you like their DPS is super close.
The blast isn't a DPS boost since it's mostly for Silence. That will always be it's main use.
I'm rather partial to GoSup with Soul Link myself. 20% passive mitigation and 3% lifesteal is nothing to sneeze at, especially for progression.
As for DPS increases, the only one I can think of offhand is using your Observer's Clone Magic on Spoils (Mantid) to take Rage of the Empress (Cast by Wind Wielders), at least for current tier. You can also Clone Agility on Xuen on Timeless Isle.