Guild Wars 2

PVP Engineers,
I have been playing an offensive roamer engineer (mostly condi HGH) since I started pvp on my engineer. Since the last patch, I decided to try something different and started building a Bunker engineer focused on survivability through blocks, dodges and healing but also on using conditions (mainly confusion stacks) to outlast my opponents on the point.

I have played around with this build a bit in tournaments and hotjoins and it seems effective at surviving to an extent that it usually takes at least 3 people to lock me down enough to kill me. I still feel like there are many improvements that could be made and I wanted to see if anyone had any suggestions for tweaks or even fully new builds that could help me make a better bunker engineer.

Here is the build: http://intothemists.com/calc/?build=-VRw;2cPFw0c-gTFx0;9;49-JT92;306-08B5;07w0;3Rk06Rk069cP

Pros:
- Many knockbacks, stuns or pulls to disrupt those glass cannons without stability.
- Can stack up confusion quickly.
- Many strong healing abilities on a fairly low CD (I almost always pick up my turret after I overcharge).
- Good combo field combinations allowing for different playstyles.

Cons:
- Does not seem very effective against other bunkers (no stability and not enough condis to pressure).
- Only one stun break (Healing Mist).
- Very dependent on dodging so immobilization locks me down a lot worse than I like.
- Low vitality, which makes it difficult to take advantage of Automated Response.

A couple of traits I’ve thought about switching around:

Explosives: Switching to Incendiary Powder (V) to keep up more condition damage while losing out on the AOE increase. This would hurt my bomb presence on the point but it could be worth it to increase my consistent damage output.

Inventions: Stabilized Armor (IV) or Cloaking Device (VI). I believe either of these could increase my survivability, just not sure if losing my Reinforced and Protective Shield would be good.

Alchemy: Protection Injection (VI) instead of Backpack Regenerator. Probably be more worth it if I swapped Protective Shield out of inventions.

Any advice the engineer community can give me is welcome!
Thanks!