Why levequests had limit? I need fast exp

[Nekotee]

This means that you did not level your crafting class while level up as DoW :P

Anyway if you want it fast
Ask around there is always a higher level Crafter that can do it for you

If you want to do it yourself be patient
Level up each DoH class and do your daily ixali qu'est

And you might be 50 in a week

Nothing is instant !
Each relic weapon are reward for time spend in the quest