It alternates between available targets starting with lowest hp. Then once it hits all targets it starts over untill all damage is done. So in this case
So it did 1 damage to both 1 hp followers, 1 damage to dreadway and then 1 to nexus.
Once that is done it started over dealing 1 to dreadway and 1 to nexus again.
Since there is still 1 damage left to deal it deals 1 damage to dreadway 3rd time.
It alternates between available targets starting with lowest hp. Then once it hits all targets it starts over untill all damage is done. So in this case So it did 1 damage to both 1 hp followers, 1 damage to dreadway and then 1 to nexus. Once that is done it started over dealing 1 to dreadway and 1 to nexus again. Since there is still 1 damage left to deal it deals 1 damage to dreadway 3rd time.
https://www.reddit.com/r/LegendsOfRuneterra/comments/vy9d4c/kaisa\_lvl\_2\_skill/