Is it best to take cannabis for acute or chronic pain?

Can't say. I have had patients who have tried it. We don't have medical marijuana in my state of georgia so I have little experience. I once had a patient from south georgia who got into trouble with the police for taking it for his severe juvenile idiopathic arthritis. He claimed it helped him a lot. You might talk with your physician if you are in a state that allows medical marijuana.
Chronic? It is likely better and most used for chronic pain. It is however illegal in almost every state.