If I had to pick between accuracy or fluency, I would pick fluency. Although accuracy is important it is not necessary to communicate message. Having a conversation with someone and passing message and ideas through language is the goal of language. However, I have to agree that in order to pass message effectively, one needs to be accurate in his use of langage.
Accuracy is something that will be developed as the learner acquires new aspects or language. Also, isf someone is not accurate when expressing ideas the other person will ask for clarification. Therefore, problems pertaining to accuracy will be monitored by others. Fluency is the first step in getting better in a language because it allows the learner to try new structures or words in context. Like I mentioned earlier, corrections will occur as the learner speaks.