Infinite arrow skill!

Is there any way to rise the duration time for the infinite arrow skill for elf? It usually lasts for about 10 mints and it is very hard to lvl up an elf. The time should be raised maybe 3 hours or until you die...

 

Is not that hard as yo think, my elf has 60 rr now.

 

elf it's to easy to lvl up u can kill a lot of mobs since u r noob lvl/reset, but u cant let the elf afk i use elfs normally and they lvl up strongly fast. and u raise ur def and attack at the same time so a li'l adventedge