How to PvE as HB

So im new, been playing less than a week. I started using falchion, but then i found on katar had a heal and it made questing easier because I could heal. I met some people and they all told me Falchion was better. Can someone exlain how it is better and what my rotation should be? I feel I take way too much damage and have no way of healing and less AOE.