So I decided to finally buy it after much thought but I was wondering should I wait till 80 to use it or should I just use it now?
Because when you create a ranger I'm sure I saw very similar looking armor for max level, I have like 1000 gems left so if I need transmute stones I can buy them but should I wait or just use it now?
Depends what level you are, imo. If you still have a while to go, and you plan to keep the look, you'll possibly go through upgrades faster than you can get the stones (obtainable easily enough from completing maps). If it were me, I'd wait. I don't like looking at the same stuff for too long, and the look of it may get boring/meh by the time I hit cap.