Day 1- Ok
Day 2- Yep definitely can make it for Victoria Harbour. Because TBH u won't spend hours and hours in the night market there.. But are u going to see the Symphony Light Show? If yes have to be there at 7pm.
Day 3 - OK
Day 4- Cant comment. never been there.
Day 5- I supposed u bought from Klook? Coz meeting up at the station exit  I feel 3.30 is slightly late la..because u still have to walk in, wait for the train to come(the crowd is crazy,even though u get from Klook but still have to queue). That time from meeting up in exit until we reached up there, 30-45 mins are gone.. And after u visit Madame Tussads, Trick Eye, it might be already 6.30 or 7? And trust me, the crowd waiting to at Sky Terrace is scary. That time i have to go there at 5+ to secure a nice spot.. If not u basically can't see things except all the people's head. U better go there early, get a nice spot. Take some sunset photos and night view photos, around 8+pm faster leave The Peak.
Day 6-  Did u research if the cable car is back to operation? Because i know it was closed for maintenance when i was there 4 months ago. If not it will affect the time for ur day 6.

But overall i realise u spent a lot of days in Hong Kong Island. Never plan to visit more Kow loon? U can consider spend more time at Mong Kok, Yau Ma Tei, TST, Sham Shui Po. I love Sham Shui Po.