Island Tribe 4 Level 1

I played this game in Hard mode. So, all strategies in this playthrough would work in other modes. In this game, workers return to the camp after picking up the resources. (This applies to both the dropped resources and resource obstacles.) However, they stay after finishing a 'simple work'. (Picking up diamonds, building and repairing something...) However, to build something magnificent(mega-sth, altar, etc.) or extinguish a fire, workers have to bring resources to the construction site from the camp. You have to pick all artifacts, collections, and diamonds and beat the level in Expert time to get 'Great' rating for a single level. Send a worker to a certain 'work' like picking up diamonds, then order him/her to collect near resources to save time for moving again.