Miio legal is definitely hard if you're a more creative and less analytical writer. however, once you start to understand the skeleton of a response question + memorise your command temrs, it should be easier.
psych is easy if you have a good teacher and a good memory, but be warned that it is a lot of scientific jargon if you're a more humanities based person.
physical education is a lot more theory compared to juniour phys but based on your other subjects im sure you'll like that. however, it scales down.
business is a similar situation; its a good subject but the scaling is genuinely awful.
my advice? i'd pick legal. maybe i'm biased, but if you can handle the content and memorisation load, its a lot of fun.