Guild Wars 2

I’ve never been a fan of bombs or flamethrower in a front line build for engineer since they seem too slow to hit stuff/don’t do enough. I’m also just getting tired of running condi builds for my engineer for wvw. So bunker down seems like a nice way to solve those problems but I can’t really decide where I want to take the build.

2/6/0/0/0 seems essential to this build. I also plan on comboing the following to get around the condi problem.
Runes of Hoelbrak/Meladru
Lemongrass or Saffron bread
AR or Leg mods
This way I can focus on crits (bunker down) and toughness (knights).

Toolkit will be my go to melee weapon to make sure the mines are dropped on the enemies. Traited toolkit auto will also cripple enemies. This is where I hit the question; to SD or not to SD with this build? Then of course which other utilities? Mine field seems really good in zergs but I’m having trouble with SD and mine field. Any advice on this?
http://gw2skills.net/editor/?fdAQFAUlUUpkrdZxmKseNicBN6yMmwA6D+gR/pAA-TFSBABBt/AXK9MTJ4VKDwTHBmq/swDAAgLAAZAYmAA-w
2/6/0/0/6. Will be easy enough to swap armor for roaming SD to zerg SD. Rifle turret is a go to for SD but I’m starting to doubt if SD and rifle turret is worth it for a frontline build. Would it be better to just drop SD? or any advice on a better utility picks?

FYI, I’m on SBI and the zergs we fight aren’t that great/don’t stack retal so I don’t think I will have a problem surviving with this build. I’m mostly concerned about upping DPS and utility. TY!
Edit:
http://en.gw2skills.net/editor/?fdAQFAUlUUpkr9dxELseRSbBFyJWRQtBRtxPXgAcUA-TVCEAB2s/QcXAgtUCykyDpUi1mOiGV/BgDEwDPQgAAIA38mB28mZoDdoDdoDthezhezhO0yAsMBA-w
Alternate build with double stun break with inertial converter. No SD but an AOE knockdown.