The cazimi state indicates pure POWER: in traditionalist astrology, when a planet is combust it means that it has NO power-its as if it were not there (as far as the chart influences are concerned) But in cazimi its power is restored and ,indeed, amplified: this does NOT mean that the planet's power will necessarily be benefic-it simply means that its power to influence is amplified: so, for example, a cazimi Mercury could cause significant malefic effects (depending upon circumstances). The ancients taught that when a planet is cazimi it is as if there were 2 such planets operative in the chart: so a cazimi Mercury would be like a double Mercury influence (benefic or malefic as the case might be) operative in the chart; a cazimi Venus as if there were a double Venus influence in the chart, and so forth.
One example of a cazimi situation was the Haiti earthquake: Venus was cazimi at the moment of the quake: Venus can exemplify human empathy, and the outpouring of empathy and soothing assistance (another Venus quality) from other nations (especially the US) was both immediate and very extensive: the cazimi Venus indicated that such extensive response was to be anticipated (I noticed this indication when I posted my delineation of the Haiti earthquake chart on skyscript a few hours after the disaster)
There was a court case horary I did here on AW where the positive outcome I predicted (which did in fact occur) was based almost exclusively on a cazimi state.
In alchemical/spagyric work, special treatments of certain metals and minerals are to be undertaken ONLY when the affinitive planet is cazimi, in order for the process to result in a successful outcome.
Perhaps in future I shall start a thread here on AW in which I can give further particulars about cazimi, as well as many examples of my experiences with it in chart delineations...