The Action States plugin allows to setup some actions to change the states of specific battlers. You can make some actions to add or remove states only against some targets. For example, fire spells set plant enemies on fire, or maybe a machine enemy that becomes confused if hit by lightning. The only limit is your creativity.
With this, the action plugins are almost at the end. There is only more one to come, wich by the way is already done, i just need to fill the help text and record the video for posting.