You've reached Level 160 on the support drone; I know you reported that 150-155 were hovering around 40M diamonds. What were the costs from 156-160 after you passed 4.1M on the support drone?
Speaking of recurring issues, now I've hit the level 150 -> 151 glitch on Apple (I thought they fixed that, except for the Amazon group) - I'm fighting campaign missions, but no longer advancing. I put in a customer support trouble call. Maybe that'll give me some time to build up my base a bit.