Guild Wars 2

Hi everyone!
Thanks for taking the time to read this. ^^

So, I was loking at traits on my Elementalist. And I found there are a lot of +5% and +10% traits that could potentially be used at the same time.

But, I (admittedly, only recently) learned that for instance +5% sigils don’t stack. And that stuff like movement speed increases only counts the highest one.

I was wondering if the case is the same for damage percentages. But after 4 hours of scouring google and these forums, I’ve found nothing on the subject.
But it looks like I could get all of these:

+10% on burning foes (Burning Rage)
+10% from an elemental attunement (Internal Fire,Air Training)
+20% when the target is under 33% health (Bolt to the Heart)
+10% from being within 600 range (Stone Splinters)
+5% against bleeding foes (Serrated Stones)
+10% when endurance is full (Enduring Damage)
+10% when above 90% Hitpoints (Superior Rune of the Scholar)
+10% from Sigil of the Night
+5% Superior Sigil of Force

Which, under perfect conditions, makes it +90% additional damage.
You can see why I’m looking into it, right? ^^’

So now, what stacks, what doesn’t?

Am I just doing +10% untill the target is under 33% health, when it goes up to 20%.
Or am I going to be obliterating everything I touch?

Some insight would be very much appreciated

The sigils do not stack with themselves, meaning you cannot equip 2 force sigils to get extra 10% damage. They also do not stack with other tiers of the same sigil, meaning minor, major, superior do not stack with each other, only one will work. The higher tier sigil will take priority.

http://wiki.guildwars2.com/wiki/Sigil

The traits bonus damage do stack as far as I know so long as the conditions are met.

Also, you can stack force and night together for bonus 15% damage. However the night sigil will only work if its nighttime. This is a popular combo for dungeon/fractal runs.

Well I run 6(VI ,VII,XI)/2(VI)/2(VI)/2(VI)/2(V) with staff in dungeons..
+10% on burning foes (Burning Rage)
+10% from an elemental attunement (Internal Fire)
+20% when the target is under 33% health (Bolt to the Heart)
+10% from being within 600 range (Stone Splinters)
+10% when above 90% Hitpoints (Superior Rune of the Scholar)
+10% when above 90% Hitpoints (vital Striking)
Dungeon weapons:
+10% from Sigil of the Night (AC, CoF, SE, CoE, TA)
+10% Sigil of X-slaying (Or Force for a +5%)m
Food:
+10% dmg vs X /-10% dmg recieved from X

For Pve general I use Sigils: Fire and Bloodlust (fire is really annoying in AC..)
(which are a long standing combo, though not the most effective )
Full zerk.

Not these however
+5% against bleeding foes (Serrated Stones)
+5% Superior Sigil of Force
+10% when endurance is full (Enduring Damage)

Whatever stack stacks multiplicative… If you calculate you know why zerk ele can make so many AOE’s so fast for so much dmg . so about 2.14* the damage while in fire, while burning , with enemy life above 33%, 2.57 in fire, while burning below when below….