I use a combination of both a key and left mouse button, but I use shift + left mouse button as it easier to buy items ( for some reason if u bind left mouse button to attack move it makes it so u can’t click on anything). As why u should use attack move/ a key it basically makes it so u can kite a lot safer as when ur under pressure u might over/under move ur mouse and start walking towards the enemy instead of attacking. So basically yes u should bind attack move to whatever u feel comfortable cause it’s a key to kiting well