Beyonce is not a standard unit of measurement, you guys...
OP, no sense fussing over numerical SAC scores as you can always climb back from them. I lost my voice the day before the Year 12 oral and accidentally dropped my cue cards way too many times. I also screwed up the first Context SAC so hard, I essentially gave up on the possibility of scoring highly for English and just wrote fun, interesting stuff within the boundaries of the criteria.
Fair warning, some of the smartest people I know got 42 for English. And in my humble opinion, they can write WAY better essays than me. In fact we had a couple of students who were very English inclined and scored well all year, but the prompts weren't in their favour, or they were having an off day one too many times, and they'd end up with a 45 or 46.
(And I know these are all amazing scores for a lot of people, but we all have our own standards, and these particular students were devastated because they felt they deserved more.)
So whilst I admire your motivation, don't let that "50 or bust" attitude get the better of you. Aim high, but be aware that some things are out of your control.