Wow, you're accusing someone of illiteracy?
Translation for your apparent brand of English: wow illiteracy accusation from you you don't even know what a period let alone a comma is you're bad at insulting me like i'm 5
(and yes, it really is that hard for someone to read what you write. That is not an exaggeration. You have no justification to get angry at someone for not understanding what you posted)
Ignoring your bad grammar for the moment, I am confused by your request (read: I am confused by your bad grammar and don't know what you're asking). Are you asking for ideas on what the premonition skill can do in battle? Or have you thought of something the premonition skill can do in battle and just don't know how to implement it?
If you're asking for ideas, I think that a good one might be to have it simply give a status effect that increases an actor's evasion. Basically, all you'd need to do for that is create a new state (go to the database. Click on the States Tab. Click the Change Maximum button and add another slot. Go to that slot. Name it "Premonition". Go to the EVA box and put a positive integer, say 20 or something. Then go to the skills, and have the Premonition skill give that status effect by checking the box for it under State Change). That would basically make it so that enemies ill miss the actor more often than usual.
Anything else I can think of would require scripts. Sorry.
If you have another idea and aen't sure how to implement it, just post with a description of what it is you want. And use punctuation.