Very grippy wax suggestion for demanding uphill terrain?

[phoenix]

That summary Lilcliffy posted is an excellent reference for you. There's are some tips to fine tune waxing technique further, which will also help. One important thing to know is how to best apply and cork the wax,
A simple summary and suggestion, using the basic principles:
Use a color appropriate for the temps and conditions. Crayon and then cork the wax kind till pretty smooth, per layer... and I'd do at the very least two, most likely three layers. For sure full length, that's been a common practice for backountry waxing for many decades.
This should be the best way to get as much grip as you can from waxing. I fing a decently waxed ski will climb noticeably better than a waxless ski, though probably not have as much grip as a full set of skins (which you could still apply to a waxed ski, with the colder waxes.
There must be some good videos on basic waxing; it might be helpful if you could see what waxing actually looks like.

[lilcliffy]

+1 @phoenix post-
In addition-
there are excellent sites and videos on grip-kick waxing-
however, for backcountry I would focus on the waxing techniques that are demonstrated- as opposed to the overall prescriptions.
It is important to acknowledge that most grip-kick waxing prescriptions are intended for Classic track skiing with fully double-cambered- and properly skier fitted- track skis.
The waxing techniqes are mostly relevant in either context- but, touring in backcountry conditions is totally different than flying on a prepared Classic track with Classic track skis underfoot!

[lilcliffy]

Thank you for the time you took to explain this to a newbie.

You are very welcome! I am happy that it is helpful.

I have always been surprised and pleased by the amount of politeness / non judgementalness I got from Telemark Talk.

I am pleased to hear that this is your experience here (unfortunately it has not always been so). As long as this site can manage to maintain this kind of culture- I will continue to participate.
......
Please keep in touch and let us know how you make out!
Happy Holidays,
Gareth