I believe that the biggest MINUS (not the only one, just the biggest one) of this minigame is "all 3 tasks managers". I was at 17 tasks - all three managers, So I swallowed the bullet and paid one, the cheapest to lvl whatever it asked... (not lvl 1, I do that always cuz I don't have time to sit and click at all), came one different task, done in 2 minutes and yes, came another manager at task 19. I have 1.2k gold and simply can't spend it for stupid manager, yet I can't even jump to another city because I don't have enough to open the chests. And jumping to another city with only 19 tasks - that's too few. No matter what strategy one tries, as long as there is possibility that all tasks will be managers without the "skip task" button, one is royally screwed, end of story.
So if this particular mess-up is not fixed I think I'll be skipping this event on live (mind, you, I NEVER EVER skipped event yet and some were bad but I always always tried).