Assassin's Apply Poison

So i wonder why some players use apply poison 1 even though there's already level 4, What is the difference between them? cause i see no difference in effect in the description except for level 1 uses only 1 scolopen poison and level 4 uses 4. Any idea?

 

Correct me if i am wrong, but i think the trigger rate for the target to be poisoned are about the same between the 2 levels. Some say level 1 triggers better than level 4.

Another reason that i know of is that they want to save scolopen poison xP

 

im cheap thats all

 

[TABLE="width: 100%"]
[TR]
[TD="class: aion_skillname, colspan: 2, align: left"]Apply Poison I[/TD]
[/TR]
[TR]
[TD="class: aion_infolabel, colspan: 2, align: left"]Uses 1 Scolopen Poison to coat a weapon. For 2m, there is a 20% chance of poisoning the target with each attack.[/TD]
[/TR]
[/TABLE]
Apply Poison I - Aion Skill - aiondatabase.com
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[TABLE="width: 100%"]
[TR]
[TD="class: aion_skillname, colspan: 2, align: left"]Apply Poison IV[/TD]
[/TR]
[TR]
[TD="class: aion_infolabel, colspan: 2, align: left"]Uses 4 Scolopen Poison to spread poison on a weapon. For 2m each attack has a 20% chance of poisoning the target.[/TD]
[/TR]
[/TABLE]
Apply Poison IV - Aion Skill - aiondatabase.com

Same duration, same CD, same 20% chance. Less MP cost, less Scopolen Poison per use.

 

Apply Poison 4 will do slightly higher damage than Apply Poison 1; that's about it. For PvP, it's not going to make much of a difference at all.