Wuthering Waves: Fastest way to level up your Data Bank

Just find Echos that need to star up on the bottom of your list, then keep track on them get absorb them. I normally do the bosses later because it takes lot of time, so just find normal TDs and get them first.
To save your time, only kill the one that you looking for.
With the bosses, if you are in low data bank level, the drop rate will be 50/50. So, if it didn't give you this time, it 100% will the next time.