I’m an OMT advocate. I have used it with two of my daughters and will be using it with my youngest. I think it is enough grammar, and could be done in a short amount of time, in just bits/ day. Not sure where the thread is, but I answer this type of question in detail somewhere here.
I did give the older two girls extra sentences as I felt the need, and I will be using some Winston Grammar, potentially, with my younger dd. I’ve had several weeks to consider this, and we’ll see. I keep going back and forth. In the end, I may just diagram sentences we make up unless she shows me that she needs a large amount of practice which I do not anticipate.