Effective ways to boost BUFF duration and Flask duration

I am confused about which passives in the tree boost the duration of flask effects such as Topaz Flasks and which ones boost the duration of buffs such as Endurance Charges and Immortal Call.

If I would like to make a build focusing on extending the duration of Immortal Call as well as Flask Buffs which passives should I invest in?

Many thanks,

1) The duration of (all types of) charges is only affected by passives and effects that specifically increase or decrease the duration of charges. Charges aren't categorized as a 'buff' or 'debuff' like other effects are.

2) Immortal Call duration is affected by all the "Buff duration" and "skill duration" nodes.

3) There are no nodes that currently affect flask duration. Flask duration can be affected by flask quality, an affix on magic/rare belts and the Perandus Blazon unique belt.



The online skill tree has a search function, so you should be able to find the nodes for increasing immortal call duration fairly easily. Keep in mind that these are additive with the Increased Duration support gem, so you can get up to 103% increased duration from a level 20, 20% quality Increased Duration without spending any passive points.

Skills and flask's are considered different forms of buffs.

There is a skill increased buff duration set of nodes above the duellist if i am not mistaken.
As far as my knowledge goes these are the only nodes on the passive tree that increase skill duration. These is also a support gem called "increased duration" which also manipulates skill duration.

For charges, the only way to increase charge duration is with the nodes behind the charges in the passive tree.

Note : increased duration support gem and increased buff skill duration do not increase the charges duration, the game engine handles them entirely separate from any other buffs in the game.

Most other buff related notes increase there effectiveness and not there duration :).

Hope this answers at least some of your questions sir.

Peace
-Boem-

Thank you.
What do the passives that affect Buff Effect do? Which buffs are afected by such a thing?