>>529309696
There's a lot to explain, and the thread is likely still going to shit on it because most users here would rather pretend they play havoc 40, than actually play havoc 40.
The TL;DR is that my aim was to make the build simultaneously as easy to play, and as stable, as physically possible. Things have to go extremely wrong for me to not contribute. Flamer is the damage dealer, boss kill, and party horde clear here. The build assumes that you get most of the ammo pickups, but theoretically functions without them.
Zero toughness investment can be a little tricky to play, but you do get good DR from blazing piety's left side, and should be under piss toughness 90% of the time that actually matters anyway, and your +% toughness curios do not apply to it.
A similar version of this build is how I originally got my true survivor two weeks after release. It barely changed since then, and it's my most played and most successful havoc 40 build. Works just fine without bubble and without veteran, but would obviously prefer to have both. The ideal 4th is a dedicated melee damage zealot with stealth, otherwise you should be playing bodyguard for your psyker, especially when the lack of vet puts ammo pressure on you.
I hope I haven't made any mistakes setting up the picture, it was all a little haphazard. I accidentally had grimoire resistance in there for a second.