I believe Serpent's Disdain only refers to status effects (i.e. burning, chilled, poisoned etc)
The other effects you refer to are major/minor buffs or unique skill effects (rooted) which are (as far as I'm aware) not effected by this set.
However there is a set that increases the duration of major/minor buffs - Jorvuld's Guidance from Scalecaller Peak dungeon (although it doesn't affect unique effects such as rooted).
I believe Serpent's Disdain only refers to status effects (i.e. burning, chilled, poisoned etc)
The other effects you refer to are major/minor buffs or unique skill effects (rooted) which are (as far as I'm aware) not effected by this set.
However there is a set that increases the duration of major/minor buffs - Jorvuld's Guidance from Scalecaller Peak dungeon (although it doesn't affect unique effects such as rooted).
Oh I understand, well thank you so much and I didn't know about the set that you just told me so I'm going to check it out and thank you.