If you look at the official band descriptors for writing task 2, you'll find this phrase in the band 9 description for 'coherence and cohesion':
"uses cohesion in such a way that it attracts no attention"
So how do you connect your ideas (cohesion) without attracting too much attention? I think there are 2 possible ways:
- Explain your ideas in a logical order so that you don't need many linking words. This is probably what you do when writing in your own language.
- Use easy linking words like and, but, also, firstly, secondly, finally, for example. These are so common that they attract almost no attention.
If you read the essay in this lesson, you'll notice that I don't "show off" with long linking phrases. The linking is subtle, and the focus is on answering the question with good ideas.