If you are struggling a little bit with the Cirelian Trial #6
located in Archer's Pass, I have found the best path to follow:
-> Green (2 lamps to destroy)
-> Blue (3 lamps to destroy)
-> Magenta (2 lamps to destroy)
-> Yellow (2 lamps to destroy)
Of course, you'll have to be the quickest possible if you want to get the 4 stars but it shouldn't take you more than 8/10 tries.
Here a video if you need some help (video is not mine):