I like maxing because of the base damage. Some people say to only get it to the same level to match the maximum amount of zombies you can have.
Example: if you can only have 12 zombies then only take it lvl 4.
Probably not. Only get 1 point in it.
I have a theory it’s worth it if you use the Large Zombies, but that’s just a theory and I never actually tested that. Other than that it’s not really worth it.
Skill levels only give base damage. I only recommend getting past lvl 1 if you’re a STR/DEX bokor (which is quite rare).
Each level in hexing increases it’s AoE attack ratio by 1. The area with it, is however quite small. So I recomend something around level 5~10 (i usually leave mine at 5). If you intend to get Plague Doctor later on to use pandemic with, you can leave it just at level 1 (but you’ll have to level your way to PD with that, unless you skill reset).
Ask Sixaxis, he knows his bokor stuff. I’m starting to suspect he’s a zombie himself in real life.