If I can reset it - I’ll share Glyph and Whisper. No reason to max both (you’re either doing Whispers OR Glyphs). Reset and dump into whichever activity.
After that, share Belial and Oath. Similar reasoning. Oath for general play, Belial when I run bosses.
Urn of Masterworking: Boosts the chance for Nightmare Dungeons and Infernal Hordes to drop additional Obducite will probably be the first one I concentrate on. I do tend to boost 2 or more at a time though.
As far as the boss powers I wasn’t impressed with any of them. There was one modifier that gave nearly continuous barrier if I remember correctly that I will use. I definitely won’t be using any that shoot a beam, or tunnel.
Season mechanics aren’t a focus for me, mainly cause they’re temporary.
In this regard I get the borrowed power and endgame concerns, but I think often the concerns are way overcooked.
If I run out of things to do or think I’ll need them I’ll take a look.
So far in s7 I’ve left it till now to have a bit of a look while wrapping up stash for the season.
Didn’t even make an occult gem or spend any rot bar getting some skills to try on the board - beast in the ice frequently doesnt even become visible before loot drops it dies so quick.