I went ahead and made a build guide video on a neat bunker engineer build one of my guildmates made. He has an extensive, well-written post on his site at http://www.barrowdev.com/?p=562
It’s a really neat build and quite fun to play. Really high learning curve though. Rewatching that video I see so many things I could have done differently to do even better (particularly I need to work on using the Rifle even more; and even more particularly using Overcharged Shot just to clear off immobilize which is a big killer against me).
Just a quick post to say that I did a tournament gameplay breakdown of one of the first tourney games I tried the Rifle Grenadier build in. Not the most amazing gameplay but hopefully more informative than a complete stomp or one where I just guard a point for most of the match =p. Was a fun/scrappy game anyway.
Should have a few more videos coming up before launch (I hope; wedding prep emergencies keep coming up from time to time so there’s always something delaying me lately).
One of the most fun builds I came up with during BWE3 was a Rifle Engineer that focused on high direct damage and great control using the Grenade Kit as a utility skill. Check the following video for some clips of it in action along with detailed analysis on several situations I found myself in while playing with it.
Edit (8/21/2012): And check out a Tournament Game where I play it:
Click past the jump for more details on the build.