Same stage here with child no 3. Trouble is we thought we knew what was what but bloody gove .... Nuff said!
My thoughts from having dd1 do A levels (arts) and DS (science) ..
Music is quite easy if you have a good sound performance ability and play often - only grade 6 at AS and 7 at A2 needed really (don't play virtuoso pieces averagely , play easier pieces like a virtuoso!).
The ethics based RE was huge fun.
English lit she gave up as pulling stuff she loved apart was almost upsetting !
Critical thinking ( and general studies - that DS did) honestly - waste of time. If you can write good essays you can write good essays - evidenced by a high grade in a narrative subject. These add nothing and aren't rated by academic courses. Yep even an A*.
Dd2 isn't even being offered them.
EPQ - dd 1 did one, enjoyed it and got distinction. Was it worth the time? Not really - dd2 may have to do it but we will guide her into a field of study that utilises niche current interests and adds breadth to Areas Of A level work (eg they study the Tudors in history, she sings lots of Tudor church music ... What she doesn't realise is how much of the political situation is reflected in the music - Protestant vs Catholic composers, english vs Latin text etc)
DS and sciences? Take maths if you possibly can at least to AS ( though I reckon that applies anyway!) don't do physics without A2 maths as well. Be bold, if you do biology it really is hard to get far in a science field without chemistry as well. A level chemistry is very hard - almost in the same way that A level maths is- a huge step up - it's wasn't just DS who found this. Biology and music were and " upwards slope" rather than a vertical cliff!
Dd2 doesn't know. She's thinking law conversion eventually but something humanities 1st eg humans sciences. She's chosen so far music (easy win for her) maths ( loves it) English and history. However we've been chatting to friends and it's been suggested she look at economics instead if English? Anyone advise us on that? She/we know nothing !