Condition Stacking

Can someone point me to where I can find info on the "Stacking Rules" or basically what conditions/effects can be stacked on an enemy?

pretty much all skills can stack on each other unless the skills state otherwise..

the only thing that cant stack to my knowlegde is Poison X2 or On Fire X2 things like that but you can stack bleed with posion or poision with on fire.

I know the Necro has a lot of health degeneration spells... do they all stack? I'm asking b/c I would think there'd be an extra down arrow in the enemies health bar if they did. My Me/E will show two arrows, 1 purple and 1 orange when I do degenerating mesmer and elemental spells together.

that im not sure about. i dont thing the color of the down arrow will change but the degeneration will excell when it is stack casted.

if both of the skills you are using use the same color code arrow it will not create another arrow of the same color but just make the decent of the helath go much faster.

i really wish they would put the degeneration lines on the enemys life bar so you can see them.. that would be a nice request for future updates