This script allows to setup states that spread through allies when a battler is under the effect. It’s possible to setup an effect range for the state.
Actor1 is hit, and in that same turn it spreads to 2 and 3. But then, if it isn't cured in the next turn, it spreads to Actor4 and 5 etc. etc.?
Not with the script as it is. since it's only take into consideration the user.Maybe you could acheive this together with the state auto apply and some custom condition.