I also used to have an Intense 6.6 (std, not SS) and reckon the SS version would be an awesome bike for the duties you've suggested.
Essential spec for any of the above:
Twin n Bash chainset, with dual ring chain device.
Wide bars and short (but not too short) stem – say 65mm ish
160mm forks with travel adjust (lyrik u-turns are my choice)
Uppy downy seatpost (Joplin or GD)
wide but lightish rims and 2 sets of tyres (a DH set and a high volume XC set)
Coil fork and shock all the way – extra weight not a problem if you're climbing leisurely, but the extra traction and plushness you get on the downs is well worth the sacrifice.
That's basically the setup on my Bullit, used to have the same on my intense 6.6 (which I changed from air to coil, hugely improved descending) and I've ridden both up and down Innerleithen all day, on all the trails there.