Gree role out training (or raiding) missions every week to entice players to spend money on getting one of these uber commanders. I have heard players commenting that what is so great about these Level 30/60 commanders? They can be merged to a maximum level of 90 which is the same as level 50 epics.
Let’s explore a little deeper into this topic.
1. Ease of attainment
Level 60 Epics might look difficult to attain at the first glance. The training missions are impossible towards the end even with 20 to 30 factories pumping out units; whereas you can get Level 50 Epics from either Elite Recruit packs or one of the Special Recruit packs (Platinum/Gold/Silver/Bronze/Copper) by getting top 5 spots in events.
If you are just comparing the cost and ease of getting just one of the commanders, then Level 50 epics is the way to go, but to many players, one is not enough, they want multiple of the same commander so that they can merge all of them into a super level 90 commander. In this case, the Level 60 Epics seems like an easier option because you will always end up getting the same commander after you completed the missions.
2. The Perfectly Merged Commander
A perfectly merged commander is created by merging 2 of the same commanders at the same maximum level. You might want to read more on the commanders merger guide here. Only level 50 and level 60 Epic commanders can reach the maximum level of 90 in the game.
In order to create a perfect level 90 commander, you need 8 of the same level 60 Epic commanders, whereas you need a total of 16 of the same level 50 commander to create a perfect level 90 commander. If you are buying the Elite recruit packs, what are the odds of getting a level 50 Epic commander from the pack? What are the odds of getting 16 of the same commanders?
In conclusion, if you are looking to create a perfect level 90 commander, Level 60 Epics is the way to go. Do take note that Gree dish out only 8 of such commanders every cycle, thus you cannot miss/fail any of the weekly missions, and be prepared to spend thousands.