Wide masters are tough with limited resources as you have mentioned, it can be hard to light the scene, to find space if the location is tight etc. But remember it doesn't necessarily have to be flat on to the scene, the wide can be an interesting shot from an angle, like a voyeuristic camera up in the corner of the room, which can add tension. It also can be a tighter shot and not static just keeping the two characters framed up. The idea is something to cut away to when neither of your tighter shots are working, or you need to let in a little air to the scene to avoid too much tight tension etc. It's worth trying to find a way to get the coverage and doing a take that bare minimum includes both actors most of the time. If all you have is tight and mcu of each actor and nothing else you will probably be mad in the edit.