Here is the progress pics:

The mortar is finish. Seems ok now. The fig on the left has been painted with enamels (base color only). I'm still waiting for Wed for the paint to fully cure then add the wash and highlights. The other one on the right (which I've just glued a moment ago) will be painted tomorrow.
A 2x2 or 3x3 simple base would tie up the whole scene. Any ideas on the addons on the base aside from the weapons/mortar rounds?