They say adding a splash of water brings out the flavor of good Scotch or Irish Whiskey....
(I think it dilutes.)
I should have checked the records, first....looks like you have Universal Hot (HC) & Universal LF, along with some LF spray.
Interesting that you do like the glide of the warmer wax and colder temps. I've tried the harder Univ & Univ LF (green) into the warmer temps with positive results, not the way you've been using it. I tend to err towards colder than warmer, especially since we often have a broad temperature range (30°F +/-). The LF seems tom help with the colder wax and moist snow. I'd expect on a dry powder day, the Univ would glide better than the Univ Hot, but YMMV.
To blend solid wax, you simply drip both flavors onto the bases and mix them with the iron. You can play around with different percentages depending how you want to 'lean the wax'. More cold wax towards the colder temps, more warm wax towards the warmer temps. This may be more hairsplitting than needed for your purposes, but it does give you some flexibility, especially if you are uncertain of expected conditions.