Retaking depends on a lot of things: (some of them are)
1. How confident you are
: Do you think that you can get a better score? Because there are chances that you get a lower score also. So, go for retaking only when you are sure of going up. Rather if you are confident enough.
2. How much time do you have
: When are you planning to apply? Don't rush into retaking if you are looking for R2 of this year.
3. Is your current score Enough
: Are you happy with your score? And are you sure that with this score you can get into the universities in which you want to?
4. How good is your profile
: Hire a consultant and tell him/her about your profile and seek an advice. As your profile can sometimes coverup for your score.
Hope it helps to decide!
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