ok, strategies for event? I read 10 cities earlier, looks like L3 from quests and 275 tasks to get L9.
3 Main strategies to consider:
1) Minimum effort:
- short run 1 for 18 tasks. Buy full set of chests for 1400.
- full run 2,3,4 for ~30, ~32, ~33 task complete cities. Buy full set of chests after each for 1400 x 3.
- short run 5 for ~12 tasks to 125 total.
- easily completed by the 45 quest milestone giving you half the event off.
2) 300 tasks to save 50 days:
- short run 1 for 18 tasks. cheap/free chests only
- full run 2,3,4,5,6,7,8,9,10 for (30, 32, 33)x3 tasks. cheap/free chests only
- about 2 days per run is relatively comfortable with long breaks for work & sleep.
- ends on 300 tasks to get 50 fragments of the golden upgrade so it's only 100 days of waiting to get the full building.
- optionally you can buy full sets of chests after 9 of the runs to get 2 level 9s instead. This is estimated to cost ~6k diamonds with minimum managers to reach those task counts for the runs
- if not buying full sets of chests, you have ~5500 spare pots of gold with minimum managers to shop for what you want for from chests or to buy "extra" manager levels you "want".
3) High-Intensity to 625 tasks:
- will get you one archdruid hut (for free) completed by end of event
- will require you having fairly strict timers running for when you're going to need to get back on and paying very close attention to managers used for each run. You only have ~2 days worth of spare time over the full 21 days!
- short run 1 for 18 tasks.
- full run 2-20 for (30,32,33)x6 + an extra 30 tasks
- short run 21 for ~7 extra tasks to hit 625.
- will have ~16 levels for free with minimum managers. can buy full sets of chests after 2 of the runs for ~3k diamonds worth of pots to finish your 2nd. And 9 or 18 more full sets of chests for a 3rd/4th level 9 at ~11k diamonds each.
There is a step between 2 and 3 where you play a lot like 3 but give up a few more hours here and there to real life and can probably hit 450 tasks for 100 of the 150 fragments needed to finish a golden upgrade and 50 days of waiting to finish it off.