Whirlwind slash issues with party play

My friends and I tried ignite whirlwind slash build because it's fun. But there are a few major issues that ruined the fun for us:

- If your whirlwind collides with a friend's whirlwind, either one of you will steal the whirlwind's elemental effect (and damage) of other, which leaves the other's whirlwind useless since they do not carry the element anymore.

- Whirlwind doesn't damage enemies standing at different elevations, which is bad for maps like steppe / hidden grotto / mire ...

- Whirlwind will disappear if you enter a boss arena or get teleported to other places, while it should've stayed with you all the time if you're still standing in it.

Looking forward to hearing your response on this.

Regards,