Bronze is used as bushing and gear material because it needs very little lubrication. The "mist" that's thrown around inside a running motor is probably overkill !! Wear on the bronze gear is more likely caused from too much endplay and movement by the cam, all the oil in the world won't help that.
Also keep in mind that "similar" metals do not like to be in friction together, this is why steel gears are used with hydraulic and solid lifter cast cams and bronze gears are used with steel rollers. HOWEVER, most people overlook the bronze bushing under the gear. This is the reason bronze gears wear like crazy on the bottom. A simple fix is a very thin steel shim between the gear and the bushing and that problem is solved. Combine this with limited cam end play and you should virtually eliminate any gear wear.