Guild Wars 2

Wondering if anyone knows when I use Hold the Line as a Guardian or Mark of Blood as a Necro, or any of the various forms of giving Regen to allies:

1. Does the Heal over time affect my allies based on their healing power or mine?
2. Does the Boon duration work based on their stats or my boon duration?
3. If Hold the Line is used then Mark of Blood by a necro, the Regen stacks in duration, but whose healing power is this based off of?

Thanks!

1.) Yours as you are the one applying it.
2.) Yours as you are the one applying it.
3.) The durations will stack, but the highest effect will take effect until its unique duration wears off, then the next highest effect will take effect until its unique duration wears off, and so on..

Source: http://wiki.guildwars2.com/wiki/Effect_stacking