Guild Wars 2

Hemophilia increases bleeding duration by 20%. It adds this amount to any preexisting duration.

However, some tooltips which are highlighted blue after traiting Hemophilia show a higher duration than they actually tick for:

- Mark of Blood and Mark of Evasion
- Enfeebling Blood and Enfeeble (Weakening Shroud)
- Barbed Precision
- Signet of Spite
- Blood is Power (not the self inflicted stacks)
- Withering Plague

There might be more. I didn’t check all racial skills.

(side note: the 2 stacks of Blood is Power that are not self-inflicted is the only skill tooltip that limits it’s duration at +100%. All other tooltips can exceed this limit.)

What happens to the blue tooltips is this:

First Hemophilia adds 20% duration, then it multiplies the sum of all durations again by 1.2.

Example, Enfeebling Blood:

base duration = 10 sec.
with Hemo = 12 sec.
tooltip = 14.5 sec.

+2 pts in Spite: 11 sec / 13 sec / 15.5 sec
+4 pts in Spite: 12 / 14 / 16.75
+6 pts in Spite: 13 / 15 / 18

Mark of Blood:

base duration = 8 sec
with Hemo = 9.6 sec
tooltip = 11.5 sec

+2 Spite: 8.8 / 10.4 / 12.5 sec
+4 Spite: 9.6 / 11.2 / 13.5 sec

Additionally, the trait Weakening Shroud shows a wrong tooltip when traited with Hemophilia:
As soon as the trait is taken, the trait tooltip copies the duration of it’s respective weapon skill.
It even adds another 20% if you switch to another weapon that has a Sigil of Agony (+20% bleeding duration) on it.

Example:
Enfeebling Blood: 10 sec. Enfeeble: 6 sec. Agony sigil on staff.
Once you you take Hemophelia both tooltips say 14.5 sec. After weapon swap to staff, Enfeeble says 16.75 sec.
Or when the Agony sigil is on the off-hand dagger instead, Enfeeble will say 16.75 at first and 14.5 after the switch.