Don’t seek to use any template and all examiners don’t like reading this kind of essay. It is not your work; therefore, the whole “chunk” of your essay would be disregarded by the examiner and deducted from the word count.
Another common issue is that many students overuse words like “moreover”, “in addition” or “furthermore”, or phrases like “this is controversial issue nowadays”. They seem to think that using these linking words will help them to get a 7. Well, they are wrong, because once you overuse those words, the examiner will notice straight away. And it is easy to learn linking words like “moreover”, so the examiner is not impressed by them. As a matter of fact, in the speaking exam, they make your English sound 'forced'.
Native speakers use "and" all the time (in both speech and writing). You can use "and" or "but" as many times as you want; the examiner will not notice! Don't overuse these words mentioned above. Although they can be useful, you should not begin every sentence with one of them. Use them occasionally.
Try to use more good topic-related vocabulary, which will impress the examiners.