Umvc3-Dorm cold star mid screen otg?

So I’ve started playing marvel and i’ve settled on dormammu amatarasu and I’m unsure of my point. However I’ve heard you can get a mid screen otg using cold star with dormammu but I’ve looked everywhere and I see no examples of it. I can do it in the corner but nowhere else.

Also, if someone could give a few good choices for someone on point for these two I would be grateful. Thanks.