Well, I assumed that moving to an EAL class ( being 100% eligible) would increase my chances of a higher score.
There are a few structural differences in Language Analysis for EAL - so you can't go into an English class with a teacher who can't teach EAL.
Plus EAL scales up, relatively weaker cohort (?) so definitely stay and don't switch to mainstream English. You need all the advantage you can get with English.
What I would do is
* Double check with English coordinator if the texts you study (and the Context) are different from mainstream English.
If not, try to switch into an English class where the teacher knows a little bit about the Section C difference. If they don't, you can hire an EAL tutor (it's not much of a difference, but enough of one) that is familiar with the course - if that's too troublesome or likely to cause financial trouble, just get them to rehash EAL language analysis during one part of the year and ditch them after that (ie. don't bother with TR and Context). Alternately, just stay with your current class.
I was in EAL from Year 7 to 8 until I moved schools. The so-called foreigners tend to not take up class time because they tend to be the quiet ones and given they perform poorly, they will be bottom ranked and won't affect you if you're highly ranked and they tend to be the ones creating an active learning environment - the same can't be said about mainstream English. You might think negatively of people who are "fobs" but they tend to try the hardest in learning the language. So don't worry about teacher not giving you attention. It's year 12 and teachers (generally) understand the pressure and give you priority (I went to school 8AM before each SAC for one-on-one tutoring with teacher) and it's those things that will get you through : ie. making time for important things - not getting caught up with predispositions
A little bit about the difference between English and EAL.
For Section A and B, they are exactly the same. Same prompts; same text lists. Section C = similar. Same article; you just need to be able to summarise an article and talk about three devices (identical to English except we can talk about as many as we want) used to persuade the audience. Of course, you're being compared with two different sample sizes
Good luck! (Also, good to see you've read the texts twice

Get keen!