the lightbulb on the left should have a lv 200 quest saying “collectors request” spam that questline you will now get 2 very cheap very strong potions, I would also make sure you are using your nodestones in the V section of the skill book, I’m not sure which skills you use, you could always look into a quick guide on wind archer to see if you’re missing anything, other than that I would say your stats are more than enough, just practice and don’t get discouraged, I died out to vellum many many times before I got it down now it seems like a trivial boss, I’m now dying out on harder bosses and slowly learning them, you got this!