p5 or p6

hello guys am currently facing a dilemma on which paper to choose from the above two because i plan on writing my final 3 papers in june but initially i planned on doing p2.5,7 but on my school timetable p2 and 5 are clashing so i have to either choose p2 and make a choice between p4 and p5 because am definately doing p7 or i take up the p5 and do p2 as pertime which i dont think is sufficient enough but i will definately support with self study..would really appreciate your input..thanks a bunch