Does the scent of the hot wax with the FO in it give any indication as to how strong the HT will be? Yes and no.....it will show you the possible potential of the oil for a tart but if you have the wrong wick it can all but destroy any idea of a throw. I haven't ever used any of the waxes you posted about so can't give reference to them. However, I would have to say to give an honest test I would let any wax cure at least 24 hours. Soy may need longer. I use a soy/blend and have found I can easily burn the candle within 12 hours but like it better after 36 on some scents. Remember when you test...write down everything ....where the candle is while burning...note of any drafts from ceiling fans...even better put in a bathroom where there aren't any...but make notes on top of notes. Trust nothing to your memory. You will have to test sooooooooooo much you won't remember your own name after a while. Make your self a chart ....include melt pool after 3 hours and give a %...2nd , 3rd, 4th burn melt pool, scent throw and make up a rating system. make up as many questions as possible and fill them out with every candle. That way you're comparing apples to apples. Remember each scent is different and reacts with the wax and wick differently.....take nothing for granted. But most of all have fun and learn from your testing....you better cause you'll be doing it for a while!!!!!!