Just wanted to make a post to explaining why it's good to have key bindings and the advantage of it.
The main reason to bind keys is to take away the hazzle of clicking things with the mouse. When you bind the keys and get the hang of it you'll be able to lower your reaction time significantly. You can bind all perks/specials that share a relation under the same key. This will give you more time to focus on other important stuff. You can make alot of perks execute simultaniously instead of having to click them one at a time. For nano's it'll check order on the bar from left to right.
Example:
You have an empty bar and fill it with:
Slot - Name - Key
(1) - Improved Complete Healing - E
(2) - Complete Healing - E
(3) - Fountain of Life - E
(4) - Bodily Invigoration - E, R
(5) - Restorative Influx - R
(6) - Lifegiving Elixir - R
(7) - Superior Team Health Plan - T
(8) - Improved Team Health Plan - T
(9) - Team Health Plan - T
Now "E" will try to do "Improved Complete Healing", but if you can't cast this due to ie. debuffed nanoskills it'll try and cast "Complete Healing". Once the "Complete Healing Line" is locked or you can't even cast the normal "Complete Healing" and you press it, it'll try to cast "Fountain of Life". And if neither of those will work it always tries to cast "Bodily Invigoration" as last option.
The same principle applies to "R" and "T".
This is just an example and your free to apply your own logic the way you bind keys. And you can even bind the same skill to multiple keys so you can make your own loops.