Board Thread:Game Discussion/@comment-5573466-20130505204212/@comment-8985788-20130507151950

I remember seeing it in the Mobage page for the TFL post, it started on the Dinobots event, here's a clue

R3 + 8 R2 = level 11 no modified XP

R3 + 8 R2 = level 18-19 with modified XP

Missile Attacks = 130-140 credits = No Bonus

Missile Attacks = 280+ = With Bonus

Weapon Upgrade R3 + 8 R2 Weapons = Level 4 50% to 70% = With Upgrade Bonus

Weapon Upgrade R3 + 8 R2 Weapons = Level 3 20% = No Upgrade Bonus

This is based on my observation and experience from the previous 3 Events, Dinobots, Seekers, and Fatal :)

hope this helps