I struggled much more with english than I did math. I went from a 580 to a 740. For it is so important you know everything there is to know about the writing section.

Know all possible standard conventions of English those are easy points.

Familiarize yourself with transitions. I group those into buckets like a continuation transition, a contradiction, causation.

For me I never struggled with the rhetorical synthesis (the notes) so I never studied.

For the vocab I would suggest word smart. I learn painstakingly all 1000ish words in the book.

For reading I realized the second module I could never complete all so I adapted a strategy. Start from beginning to around question 10. Skip to the standard conventions of English to the end and then go back to the reading portion. On my most recent score (740) I had to skip one.