A Hello aliceanne,
Great question. For your wrinkle concern under your lower eyelid, microneedling, maybe subtle botox or very light peel may help. For the dark circle and hollowness, a subtle hyaluronic acid filler could help. Regarding your downward slant, this is best corrected surgically. Botox will not help this. A simple procedure will raise your lids to re position them nicely. My suggestion is to seek out an expert oculoplastic surgeon to have this discussion. Hope this helps.
Cheers