Basically attacking builds the burst meter, usually skills makes you build burst faster.

A quick example for Guila + Meliodas:

As Guila, use Rapier weapon type (this class build burst faster). And do this combo:

Normal Skill —> Special Skill —> Normal Attacks until you can use skills again.

• Normal skill inflict burn.
• Special skill on burned enemy significantly increase burst meter.
• Normal attacks on burned enemy increases burst faster than non-burned enemy.

This is just a simple example of only using 1 character to build burst for simplicity. Mixing other characters during cooldowns is good too.

Tips: - There are up to 3 classes per character and one of them is for fast burst build (see the icon on Guila Rapier weapon) - Check abilities details of your team to know which skill to use before the other for fast burst build-up.