Most important fields:
Data - Damage Return Factor - tells how much % of damage done by each locust is returned as life for caster.
Data - Damage Return Threshold - describes maximum amount of damage, single swarm unit can deal per round (it has to return to the caster to be able to cause any damage again).
Data - Max Swarm Units Per Target - maximum amount of locusts focused on signle unit.
Data - Number of Swarm Units - amount of units summoned with cast.
Data - Swarm Unit Type - unit-type of summon.
Data - Unit Release Interval (seconds) - the delay between summoning each new locusts (example: default number of units summoned: 20, default delay: 0.2 =>> 20 * 0.2 = 4 seconds total before last locust leaves casters position).
Stats - Area of Effect - tells how far locust can move away from the caster, it immidiately returns if distance between it's position and caster is greater than given value.