I have never used a grid or miniatures.
I have used a whiteboard, using very rudimentary floorplans or reference marks on it,
I've used a couple of dice just to show relative positions;
In the campaign I'm running now, I try to rely mainly on the idea of the imagination - describing as viscerally as possible the layout the characters see before them, the arrangement of the battle, etc.
My best suggestion is to go with the whiteboard with dry - erase, and use it as simplistically as possible (Xs and Os-style).

I have used a whiteboard, using very rudimentary floorplans or reference marks on it,
I've used a couple of dice just to show relative positions;
In the campaign I'm running now, I try to rely mainly on the idea of the imagination - describing as viscerally as possible the layout the characters see before them, the arrangement of the battle, etc.
My best suggestion is to go with the whiteboard with dry - erase, and use it as simplistically as possible (Xs and Os-style).
