Guild Wars 2

Hi, I just tried to swap Entangle for Spirit of Nature in WvW and I have two question:
-Question 1: Since it only has an influence on allies I couldn’t personally estimate its impact but the strange thing I noted when I clicked on nearby allies is that they did not have icon of any type indicating a buff (like for example the ones you get from a guardian) so, can you confirm this elite skill actually works ? If so, what is it radius of effect (it is not indicated in the tooltip nor on the wiki)?
-Question 2: Sometimes it is semi-transparent and sometimes it is plain, is there a reason for that?
Thanks.

Range not sure. Maybe around 350?
Works on allies? Yes. But no buff icon.
Question 2: Think it’s a bug. It happens to other spirits as well.

Ok thanks, can somebody confirm the range? I see normal spirits have 1000, 350 wouldn’t be much considering its life expectancy when put near the fights.