Are hexes better than curses? I've done a bit of reading, and I heard that it is probably so.
You see, this guy I know is harming my sister, without her knowing. And causing my best friend mental/emotional harm. I know of the threefold rule, but my beliefs are that what you think about, you bring about. I was thinking of casting an elemental hex on him, but only if it won't cause him much harm. Thoughts?
I strongly believe in karma, but if you must and think it's best for you to curse or hex its fine..i only once practiced against this girl that was bothering my sister and her boyfriend and i never heard of her bothering them again. It never backfired.
Hexes are more of a one stop shop, get everything done in a single go and then pulling the heat down. A curse on the other hand is binding a particular woe or situation to a person. I've heard of and used both being used in a variety of ways.
Barring a particular situation.
A string of bad luck.
Any work that you keep working (i.e. poppets, buried jars, goofer dust, etc.).
Now, I can't say that I quite understand what you mean by an elemental hex? I've never personally used Elemental Maic, however, in the case you mean incorporating elemental representations (i.e. salt for earth, hot sauce for heat/fire, etc.), you may consider placing hot sauce in his shoes, or crafting a poppet and applying hot sauce to the poppet's feet. A watery grave could be placing his poppet in a relatively large jar of water, filling it wth pins and glitter and keeping it shaking will distract him and be a figurative pain in his side.
I wouldn't suggest you need to do very much apart from being a big brother, if your sister feels she is being harmed and your there for her that's all you need to do. A protection spell on your sister and praying for her protection yes, but don't think your powerless to help her, in fact your probably the one person with the most power too ;)