1. First, you can increase combo times through equipment attributes and item effects. For example, some equipment can increase combo times by three times, and some weapons and jewels have similar effects.

2. Secondly, you can increase the number of combo by adding skills. For example, some professional skills can increase the number of combo, and doctors' skills such as "clearing the fan wind" can increase the number of combo to 5.

3. Finally, other auxiliary skills can also increase the combo times by increasing the attack speed. For example, separation can increase the attack speed, thus increasing the number of combo.