[quote=@Hekazu]
[@The Harbinger of Ferocity] You don't have to/get to roll twice to knock people prone, if you are using the shove action as discussed on PHB p.195-196 under "Shoving a creature". If your first roll succeeds you can just declare that they fall prone (or alternatively push them for five feet). Doesn't seem like you could combine the effects in RAW form, so it's up to the DM to call on that... Sorry about "rules lawyering", I guess I am just too used to doing it. The shove action replaces (up to?) one attack action, so doing both would kinda give you an extra attack.[/quote]

I am aware that the shove action has two different uses, having evolved from bullrush and trip but with choice instead, of which I am using both in this case. I do indeed have a sufficient number of actions, too. I intentionally chose this course very selectively, but I appreciate you having the breadth of experience to know the rules that [i]usually[/i] this combination is not possible.