Level 1 need 3 MK4 (2m/1,7m) +2% mission payout
Level 2 need 7 MK4 (3,4m/2,8m) -2% upgrade cost
Level 3 need 10 MK4 (5,3m/5,1m) +2% infantry attack
Level 4 need 15 MK4 (10,2m/10,7m) +3% raid payout
Level 5 need 20 MK4 (26.9m/20.3m) +1% building payout
Level 6 need 25 MK4 (41.5m/52.9m) +4% sea defense
Level 7 need ?? MK4 ( ??m/??m) +?% ???
Level 8 need 35 MK4 (??m/??m) +1% triple strike
Level 9 need 50 MK4 (??m/??m) +6% air defence
Level 10 Need 75 Mk4 (98m/102m) +2% Alliance Attack