There is this weekly endeavor that gets completed when slaying 250 enemies using weapon abilities. I completed it in less than an hour.

In northern elwsywer (I can't spell the name of that zone) outside of the city Rimmen. There are all these huge packs of viciously cute jackals roaming around.

I switched out my all templar skills for dual wield weapon skills. I can also run very fast due to high amount of stamina, sprinting speed cp jawn, and quick stamina recovery. I discovered when using whirlwind, I can one-shot each one of those jackals all at the same time.

I was literally running all over the place spamming whirlwind weapon ability where ever there are jackals. My character looked like a beyblade doing that. Shredding everything in her path while spinning just to get 250 seals of endeavors coins. It worked.