Ok, lol...I had the desert adventure already out, and got the sand when I collected from it (Castle), so got it on first try Then I sent out the knights to the dark caves from the Castle and to the feral lands from the barracks. I collected this night from the Castle, and got the crystal, so success on the first adventure there too. Another neighbor got the vine on second try. To me these items do not seem to be very rare drops, but I guess we still need some more players in the update to be sure... I made one extra of the glass chamber and refined life crystal, but the skipping idea might work if you're lucky with how the goal is made. Impossible to know yet...
Auto completion of the desert adventure goal
Edit: No goals have a timer on them Some of the pics might have been posted before, sorry about that, in that case. One of the pics I posted because some text were missing in the earlier posted pic.