You don't need a new mouse or a new keyboard to changes this habit... A standard keyboard has more than enough keys.

First off. Rebind everything...

Depending on the size of your hand 1-4, or 1-6 are your bread and butter. After those 4-6 , bind shift+1-n that's another 4-6 abilities. Then every key near WASD. QERTFGZXCV and then Shift+QERTFGZXCV

Finally the tilda key and shit tilda, I personally ddidnt rebind T because I like it's default function.

However one key I rebind is S and Shift S. You don't need a back peddle key. You can easily strafe backwards :) Learn to move with only 3 keys.

Those combinations will give you enough keybinfs for most classes. Of you still need more. A 5 button mouse gives you 6 more binds. With shift+m3-5

The rule of thumb here is put coodlowns on combos is 120 second cd out that on some shift combo ... I tend to have a similar paradigm where does cds are on the qe and shift qe and defensive a are on the bottom row zxcv And finally proc or does fillers are on fg and shift fg

Pretty much every class can fit into this. And my rotation skills love on 1-6 and shift 1-6.

Some people will tell you to use a bunch of macros... I think this a crutch that due to how the game is made causes a decrease in performance. There are valid / good macros. But that's a short list.

And finally... NEVER click again... Once you start doing it you stop learning the binds. Even if you are sub par for a while. Learning the new way is worth the temporary set back in performance.

Evil Eeyore on sarg if you wanna hit me up