Lol though don't take the sophisticated approach too seriously. There was a dude in my English tuition class/school class who kept using words that he didn't even know, in fact this guy couldn't even pronounce those words let alone understand the meaning of them. In every essay he wrote it was practically so complex that you wouldn't even know what he was trying to say.
Btw, for those who use Microsoft Word, beware of the synonyms function, and only change that word if you feel that its 'right' to do so.
After my trial exams, I was able to locate my element of essay writing in that I needed a solid thesis which was constructed in the introduction and used continuously throughout the body, in other words, always answer the essay question, and if needed, repeat the keywords of that question, that's what allowed me to get into band 6.
Another thing that I found when correcting yr 11 essays was that alot of students tended to forget linkage between each paragraph, so say at the end of the introduction students would sometimes forget to end it off by answering the essay question direct.
So if it was an Impacts of a journey Discussion question, the end of the introduction could be: "Just as the sentimental impacts are felt by immigrants at Central Station[/i]", so too are the travellers in ...."
Then the next aspect would be again referring to impacts in the 1st sentence of your 1st body paragraph, linking it to your first text, or even 2 texts in discussion [similiarity/difference]. I'll post up the essay I used in trials/hsc soon, probably write a short essay guide.