What is the best way to do third person melee combat?

So for our game we want to have third person melee combat, using a sword, with a crosshair. What would be the most accurate way of doing this?

A collider on the end of the sword maybe? Or a raycast/spherecast?

Are you looking for a hack and slash type combat system? Usually you dont rig the transform itself with any collision - the model is just for a visual representation of what the code is doing.

Perhaps this line of tutorials will help: http://www.burgzergarcade.com/hack-slash-rpg-unity3d-game-engine-tutorial