I have over 800 diamonds but I have 8 worlds that use the same diamonds. like they're connected diamond wise. so I cant really use them all on one world, I could, but then that just doesn't flow with my ocd system. the builders hut on the other hand, I just stay at level 2, and I'm just attending the spire and stuff to keep building up my diamond supply so it can be distributed throughout my 8 other worlds. and its also a matter of opinion weather or not you use them for more then one thing. but yes, diamonds is the only way, was my point.