IMO it is better to use specific ingredients in a single application than an all-encompassing product unless you literally have no time. Pixi acid toner would be great after cleansing and before you apply the serum and then the day cream after that. Followed by a good SPF (when I say good, I don’t mean expensive, just factor 30-50 that can be worn under makeup if you wear it ). If you are using a pixi Vit c product it is a bit of a waste adding the serum on afterwards. In that situation, and When you’ve used your No7 up (which is a decent product but won’t have either Vit C or Vit A (retinol) in any meaningful quantities then replace the treat or serum step where you are using the no7 with either of those products to brighten/reduce fine lines. For the P/m choose a soothing hydrating moisturiser to avoid compromising your skin barrier after vit A application. The inkey list peptide is a great product. Hyaluronic acid is a plumping agent so won’t do any harm in conjunction with a vit c.
Double cleansing after removing makeup is also a game changer to a clearer skin - I use the Inkey list oatbalm as a first step then a creamy cleaner as the second. The daily wear of SPF over the past 5/6 years has also been a massive benefit in my case.
once a week I do a resurfacing mask/exfoliant - the Ordinary AHA 30% + BHA 2% is a good one (£8 or so) but is quite strong. Followed by a hydration product such as La Roche Posay cicaplast repairsbalm or similar very hydrating product. I also apply a fake tan once a week (it makes me look slimmer in my head 😂) I use St Tropez express bronzing mousse that works in as little as an hour - max colour in 3 hours.
In terms of professional treatments I have a dermaplaning session once a month (menopause face fuzz begone!) an eyebrow tint and tidy and an eyelash tint and lift every 8 weeks so that I need minimal makeup day to day.
Disclaimer- I’m not a beautician, just someone who has had an interest in this area for a looooong time!