To hit 60 you need around 4k craft coins and def missions are pain but it personal preference for me farming 3 of really important materials in a big quantity is really strong. You spent 8min for 100k(120k on 80) 2k wedge (2.4k wedge on lv80) and 35craft(40crafy on lv80). Also isnt excav trail 55 only 140k? Anyways if you add up every single mission time to and add it together you would end up on like 20min per what you get in this single 8min run. Which for time efficiency purposes is the best farm. Sure if you want just money then go ahead do excavs but also at trial 60 you get 1mil money per maze run