Greetings.
I have not played all classes (just Rogue), but would like to get access to one more key/command to slot an ULT…
Config:
1 Basic Attack (Blade Shift)
2 Flurry
3 Dash
4 Poison Imbue
5 Poison Trap
6 Shadow Step
??? Some ULT
Thank you
Sorry according to the karens of this forum asking for a keybind means your a negative nancy who should leave the forums and never buy the game, no critisism or feedback is allowed to enter their eyes blessed by inarius himself.
That being said i agree ultimate needs its own key slot.
100% agree, except they should allow several more key binds at the least. This game is going to feel incredibly limited with 6 keybinds. The entire talent tree is garbage with only 6 slots.
Agree, 1 more for the ultimate would make it so much better. There are so many skills/spells in D4, having that 6 max really limits build options.
On my sorcerer, I’m not even using a Mastery spell.
We desperately need another action button and an ultimate button. Consoles have triggers that can be used with other buttons for these abilities. The current setup is so limiting every class only has 2 or 3 cookie cutter builds.
Just thought about one thing…
We probably could get one more command to summon our mounts. 
By some old gameplay videos there are some fast “unmount” actions and characters starting fights almost immediately… Does not looked like a disk action…
I’m planning a build that uses 7 skills; 6 main and 1 that I swap out just for Bosses. That said, a dedicated Ultimate key would be nice.
There is a dismount/attack keybind. I can’t remember off hand what it is though. I don’t think it is a real attack though. Recent video they said it was just to look cool.