Is this Advanced or General?
It's basically General, the new syllabus doesn't refer to it as General Mathematics anymore, it's just Standard Maths.
As for the actual post, I still don't really get why you need 4 extra subjects but judging from your current subject selection, it seems you are more focused on the English subjects so you're probably a Humanities person with a little bit of science and home economics splashed in.
Chemistry- has good scaling, is probably the hardest science because in my opinion you need to be good at both maths and English to excel in the subject. Don't really know much about this subject but it could complement your other science of Biology.
Modern/Ancient History- I recommend you choose one of these, it's up to you, Modern is of course focused on recent events eg World War I/II, the Revolutions of the World, Alliances and all that sort of stuff. Don't really know much about Ancient but I guess it focuses on events from hundreds of years ago eg Pompeii, Egypt, Archaeology and all the civilisations that shaped who are today. Both have decent scaling and I think Modern scales a bit better. Also both have a fair bit of content, remembering key events and impacts, etc.
PDHPE- Don't really know much about this either but apparently there's no PE involved it's just the PDH, it'll help with physiotherapy and physiology and anatomy related stuff if you're into that, decent scaling and there is some fair memorisation and content like the histories.
Visual Arts- You're already doing Hospitality so not exactly a beneficial choice to choose this subject but if you really enjoy Art and is very creative then by all means go ahead. There is a major work involved and I guess it's 50% theory and 50% practical testing your ability to paint, draw and lino stuff, I don't know much on this sorry..
Physics- Once again you could choose this to complement Biology and double sciences are pretty common, that is if you enjoy science and do well at it, choose bio + chem or bio + phys. You could do all 3 but that's if you really enjoy your sciences or otherwise you'll be bombarded with mutoiple assessments during exam season. Probably more mathematical related with concepts of circuits, space and electricity calculations?
Economics- Contains a lot of memorisation and rote learning, I take this myself and the Preliminary course has 6 topics and if you don't write notes, it'll be hard to remember every single concept in this subject/topic. Has good scaling, that is if you do well and is a good social science subject that tests essay writing and economic terminology.
Sorry if I wasn't that detailed on my explanations but Good Luck for the future and hopefully you'll choose the subjects you love and are interested in.