This achievement requires you to play 30 matches using a combination of different team sizes and custom Ensemble (Assist) attacks. Once you have selected the required amount of team types and assists, this will unlock at the start of the next match. The characters and color pallets you choose for this do NOT matter. After you pick a character there will be 3 assists options, the first two are regular assists and the third one is the Custom. Pick Custom and map any button to set the custom Ensemble Assist. Here are the requirements:

Play 10 matches using a team of 3 members and using a custom Ensemble Assist for each of them.
Play 10 matches using a team of 2 members and using a custom Ensemble assist for each of them.
Play 10 matches using a character individually.
When the match starts I don't recommend you immediately pause and change characters when going for this. Play the match to the end, select "Change Characters" and continue fulfilling the requirements from there. You do NOT actually have to use your Custom Action Ensemble assist during the match to unlock this, just play the match to finish(no timeouts) then continue fulfilling the above requirements.

Fulfill the 30 requirements and if done properly, this will unlock once the next match starts.



~Int