There is no limit to combobursts. You start naming them like in an animation like comboburst-0.png, comboburst-1.png, comboburst-2.png, etc.
They always appear on set combo counts; starting at 30, then 60, followed by 100 and everytime after 50 more combo. To make all appear more frequently just add ComboBurstRandom: 1 to your skin.ini file under the [General] section of it.
They always appear on set combo counts; starting at 30, then 60, followed by 100 and everytime after 50 more combo. To make all appear more frequently just add ComboBurstRandom: 1 to your skin.ini file under the [General] section of it.