Making Charm effective
 

Would it be possible to make charm spells useful without making it necessary for people to download a custom spells_us? Like can you just make it last longer and not wear off every 10 seconds?

Lower the NPCs resists in the DB. It's already been done on PEQ, but it hasn't hit SVN yet.

but it isnt just resisting. It seems whenever they get hit it will get rid of charm as well.

Every tick spells like charm, fear, root, etc check to see if the NPC can break the spell early. This is done against the NPC's resist that effects the spell in question. By lowering the NPC's resists in the DB, you lower the chance that they will partially resist the spell and break it early.