I will advise you to go for EOR. You don't have anything to lose. You have scored 7 previously and never scored below 6.5. Chances are that you will get that 0.5 increase. All the bestGiven that your writing scores have hovered 6.5 - 7 . I think probably that will not change. Reading and listening i dont think will change after EOR since it has fixed answers. Listening you already have 8. I think don't go for EOR