OnCombo(function() end)
OnLaneClear(function() end)
OnHarass(function() end)
OnLastHit(function() end)
Those functions must be each time the original key is pressed, regardless of "Enabled HarassCombo" checkbox!

Also, it should look like that (in loader)
lua-interpreted
function Combo() Do_Every_OnCombo_function_if_there_any Call_Orbwalk() endSo if we do this:
OnCombo(function() CastSpell(_W) end) OnCombo(function() CastSpell(_E) end)function should do this:
function Combo() -- CastSpell(_W) -- CastSpell(_E) -- Call_Orbwalk() endAlso it is a good idea to do something like 'SetOrbwalk(function)' function, so it can replace standart orbwalker.
Of course, if there is no OnCombo lua things and there is no custom orbwalker, then you can use standart QWER mechanics that is already implemented.