How to set Buff Duration for: Heal, Spirit Touch, and Essence of Blight?

[Map Designer]

Hello,


I noticed that when there are too many units around obsedian statue, he prefers to give mana to some units over others.

is there a way to make this buff linger more, so that the statue would replinish mana for different units each time?

btw, I have tried to change duration field to 3 seconds and more with no use. it still replenish for same units

Edit: to make it clear, the buff do stay for 3 seconds, but units having the buff can still be healed/replenished. i.e. having the buff for longer duration did not prevent the heal.

so the only way is to do it with triggers? or is there a work around?

 

[Tasyen]

For heal the buff stays cooldown seconds, during that time other healers can not use heal on that unit.