How does direct approach works?

Hello, I want to refine my build so i started adding crit hit chance, bu i don't know how direct approach skill work it says:

35% increased critical hit chance agains enemies that are affected by no elemental ailments

I think it works like the following:

I make them bleed or aggravated bleed and i get the 35% increased crit.

but i can mean the if they have no elemental ailments.

In this case i don't need to make them bleed i just need to avoid to ignite, shock, poison, ect. bleed is still working but not necessary.

Can i get some answer from someone who knows it thanks :3