The best chest result I ever had was on my last HST cycle.
I halved the volume per exercise - 1x10 and 2x5 - but had more than a dozen exercises each workout, including Flat Bench, Incline Bench, Flyes and Dips (because I wanted to focus on my chest). The other exercises were split evenly among all the other body parts.
So, in other words, my advice is: Don't waste time doing the same exercises over and over again, do different ones, and more of them. As many as you can think of or enjoy, in fact. And if you need to save time, reduce the number of reps per exercise. It'll be the same work done at the end of your workout, but you'll have hit your muscles from all angles.
Or, in one sentence: If you want to focus on your chest, do lots of different chest exercises.