Kent is true (right)
800€ should be the minimum but 1.000€ is better, as you will agree.
To answer your other question: no, it should make no difference as to where you go. Only the per diems change.
I do disagree with Kent on the stby-rates though. If they do pay you the same adequate rate regardless whether you fly or not - fine. Don't give them any good ideas.
But generally (and I do know this from personal experience) the lower rate for stby is for keeping you from running away to others. The operator isn't making ny money either when the airplane is on the ground. I would agree though that the stby-fee alone would not be enough to keep you running.