1. Event - get more rewards
2. Main - to open upper contents
3. Side Story - until you get all side only characters
4. Supply - when you did all 1~3 but you have Eterniums left (check more details below)
This [Counter:Side] Guide is based on the current META on SEA server of the game, which is 1.5 years behind KR version and 6 months behind TW. Since we don't have access to many characters, whose best at what will differ. But please note, it's not worth chasing an unit that's good now, but will become meh later down the line
Awakened employees are the best in [Counter:Side], far stronger than the normal ones. That's why it's crucial to save your resources to pull on them. But beware! You can't do it using the normal tickets and a separate currency is needed (which you can obtain from various gamemodes).