Milestone keys don't count for gaining spin attempts, been such since the early days of the event. Similarly most temporary items don't count in to for the events.

In general, some of this stuff is a bit out of date, mostly do to the fact that with the addition of groceries and other events hard freezing tends to be more detrimental, best example being the 20k moon scrolls a week ti can potentially give, which can equal 50 medium refines or 100 keys. In addition 6.0 added advance refines to redemption shop and to the monthly event rewards, making the value of sage world as still relevant, but not as required. Overall, if freezing i would recommend the following, never do wanted except for the min of the event freeibes, and never in a group, do min damage to the fox to claim the small amount of sun coins, and only do ninja test on non double day if your confident you can get perfect score for the up to 3000 moon scrolls ( = 175 coupons in medium refines or 195 coupons of keys), don't do plot or elite instances except for events requirement and if working to breakthrough a common ninja or upgrade a tool, do team instances since the experience given to moon coins gained is worth it, Ninja exams are personal choice but recommended since magatama are useful and overpriced in groceries.

To be specific, for freezing your trying to make leveling up take as much time as possible, but ideally getting as much free stuff as well, since around 80 you need 20 million exp to level certain things need to be avoided. Wanted is purely for exp thus should be avoided as much as needed, fox gives the most experience by far if done well thus only the min should be done ( single hit or just till the mask fight ideally), daily practice since lots of exp for small rewards, and Ninja exams as a toss up since gives decent levels of exp (260k~ around 160) but also gives lots of magatama which make a bulk of primary stats.