Okay. So playing many MMO’s, MOBA’s, and any sort of game that requires grinding. This game was no exception. That 50,000k for a mercenary, O… M… G… (look at her butt…) I decided to put to the test how I can achieve all mercenary’s without paying a single dime. Because if you’re like me, you just don’t want to spend anymore money on online gaming anymore.
On the first day, I was able to achieve 10,000 credit before going to bed.
The next day, I figure, I could actually hit 20,000 credit. And Sure enough, I was able to hit 20,000 credit and putting me at a total of 30,000 credit.
You see, realistically, you could grind your way to all the mercenary in just a month, and still have a ton of cases to open without ever buying any.
Out of 10,000 credits that I grind on the first day, I was able to achieve roughly 10 cases from drops, and leveling one time. During the next day on my grind to 20,000 credits, I was able to achieve roughly 20 cases from drops. That’s roughly 10 cases per 10,000 credits that you’ve grind in one day!
This is all simple math from here. It means, if you were to only grind 10,000 credits per day, you’ll be able to purchase a mercenary every one week. One mercenary + 10 cases per 5 days. Within a month, you’ll have six mercenary’s and 300 cases.
Grinding only 10,000 credits is for those who don’t really have time. For those who do have time and play this game more than others. Grinding to 20,000 credits a day is more ideal and possible. Simple math again; within one week, you’ll be able to purchase three mercenary’s + 140 cases. In a month, you’ll have 12 mercenary’s + 560 cases.
The trick is this: Don’t spend your hard earn credits or use the case box at any means. You have to understand that, with a luck base game, having more boxes will increase your chance of getting a very nice rare card. Oppose to opening 1-5 boxes each time you receive it.
Here’s a screen shot:
*I used at least 5-7 boxes before I started saving it instead. 
*During my 10,000 and 20,000 credit grind; there was no extra credit giving because of a beginner level. I have already received the 12,000 credit when I started playing and I purchased Vasili. The above statement and picture was from me grinding WITHOUT the 12,000k at level 2 and 4. It was just from daily challenges and first win of the day.