This has been the same in every game for the past 10 years though. HPs are good against burst, armor is good against sustained damage. Classic HP pool vs mitigation scenario and almost every game has gone the same way and that is HP is better vs burst.
I mean I get that the forums are a point of discussion but if you wont' actually try to discuss the issue it makes you look silly and well you have been proven wrong in almost every discussion of this issue so I guess maybe I just let it drop as you being a troll or grossly misinformed.
At no point did I suggest you ignore toughness and stack Vit. I just offered the true opinion that Vit is better vs pure burst damage? In organized PvP where you get healed and you use crowd control to minimize burst than toughness is very strong. Against pure burst and against uncontrolled condition damage vitality is stronger. I never once suggested you should pick one over the other, I just gave an honest assessment of which one is stronger in which situation and nothing you have said has disproved it in any way.
That makes no sense at all. Burst damage removes the effect of healing completely. It is a simple function of effective health points. If you ignore healing and assume massive incoming damage and ignore all other factors than vitality easily out functions toughness. It isn't even very close. In GW1 it wasn't quite the same but GW2 works with completely different mechanics.
The function of toughness is to stop manageable spurts of damage and to maximize the effectiveness of healing, it is not meant to stop burst damage. This isn't one of those it could go either way and is up for debate type of things, if you think toughness is better for burst damage you are flat out wrong our misunderstand what burst damage means (which is possible).
Again, the official strategy guide says otherwise, but there are plenty of mistakes in it, and it could be wrong, but it certainly seems to be what devs have been saying for a long time. I'm almost 100% positive I've heard Jon Peters talk about how vitality was better for condition damage, where toughness is better for spike damage...but I couldn't probably find that quote at this late date.