mouse 5 is my melee button because i just couldnt hit v when needed, but i reach n with no issues at all. think it depends on what works for you, play around with it is my noob advice

I use the F key since then you don't have to leave the key cluster for movement to toggle it on and off. Toggle on scan toggle right back off because it takes to much energy. I use razer mamba mouse it has 7 buttons and they are all already mapped to something else (best mouse ever made hands down too, you should seen me explain to my gf why it was completely necessary and justifiable to spend $130 on a mouse lol). I mean come on the thing sits on a glowing pedestal and the light pulsates emanating its presence across a dark room like a Mouse God.
pretty mouse! the question though: did the gf accept your justification?
*typo edit