[Evilaizen]

You can also use Auto-Hotkey to keep pressing 1. I put Sprint on that slot and that didn't make any of my melee classes afk out of the duty. Here's a sample of my script:

~$*1:: ;This makes the hotkey, so 1 triggers the script
Loop ;loop the script untill broken
{ ;loop start
GetKeyState 1, P ;Get the state of 1
Send {1} ;It hasnt been released so send another Click
sleep 675 ; This is the time between presses, after its slept it will return to the top of the loop and start again
} ;loop end

Enjoy!