What I have been doing for the past month
Lesser Soulflow Engines - 77m
Tier 11 Lapis Minions - 66m
Large Storage's - 12.1m
Super Compactor's - 12.8m
Enchanted Lava Buckets - 7.2m
Tier 4 Beacon (will have by today or tomorrow) - 14m
Beacon Fuel - 2m
Total Cost - 191.1 MILLION COINS
If you guys want to know how I made 191.1m in a month let me know in the comments