Nice work! Good conversions, nicely painted.
You asked for advice, so
perhaps the problem with the object source lighting on the pistol-toting magician is one of the following things:
1. There is no object! The light source lies outside the 'diorama' of the figure and its base. This relies on the viewer using more imagination than if there was a gas lantern, ball lightning, pistol discharge or whatever 'in scene'.
2. The bright highlights are white. If you shine white light on various surfaces (cloth, metal, wood, etc) few of them actually become white. They are not white to start with. They instead become brighter versions of their normal colours.
Fixing #2 will also probably fix #1. The first problem will not be noticeable if you can get rid of the second one. I see two options:
Repaint the highlights so that they aren't pure white. The catch is that this will be hard to tell apart from normal highlighting (because of #1 above), so I don't recommend this option.
Or, you can use a coloured light source. Red? Blue? Yellow? Shine a light of this colour on wood/metal/fabric etc. and it WILL appear to change colour. You may find it easier to ignore the real-world physics of which things should appear lighter or darker (e.g. a red object is actually black under green light), as you can probably get away with a simpler comic-book-like technique where everything becomes redder, or bluer, or whatever.
By using a coloured light source, it will also be instantly clearer to the viewer that this is not just your everyday highlighting, and that even though you can't see it, there must be a light source somewhere out-of-scene.
Now that I think about it, I can't recall ever seeing OSL done well using white light. Painters always seem to go for one colour or another.