The builds I gave are only a base for a DPS in PVE only. You can adjust them as you want taking less DPS and more defense and / or heal.
Bark shield is only necessary in some cases (mostly in Eclipse raid, but no where else), but Bulwark rubis are quite enough for defense.
Yes, great hunt only affect your pet's basic attack. It's not the biggest improvement, probably the lowest, but still an improvement.
Vibrant healt is a good heal, but you have to sacrifice up to 40% of your DPS to use it. So it can help in really few circumstances. It really depends on if you consider your warden as a support class or as the best DPS currently :p
Currently, it's possible to mix a build between a good DPS and a good support heal. It's your choice