@MadameCurie
That's totally fine! I think it all comes down to personal preference and strategy, how many gems and energy one has to spend, etc. I personally don't like repeating events (I've only repeated a few when it was really worth it to) and I can't stand repeatables! So I force myself to do them during postcards and DMW and almost never at other times. I did 116 yesterday and I’m so done with it…
I would like to eventually do each shop event once though, so I try to be strategic on what to open when – whether looking at repeats, equipment, gems, materials, etc.
For postcards specifically I would add to your list:
- Adventurer 13, Easter 14 and Winter Games also have 4 repeats (1× 8 hr, 3x 23 hr)
- Halloween 13, Magisterium, Detective Stories 1 and Arabian Nights each have 2x 8 hr repeats – effectively giving you 2-3x the postcards (Halloween 13 also has a 23 hr repeat)