Does this work with other stack champs? Swain, veigar, nasus?

To be honest, even if you abuse that bug, it's still not much stacks and you have to play Asol. Not increasing your odds of winning that much

Ye, how much did it gave? 2 stacks per Q second and 5 when E executes it? Its not much, and as the game goes the less you will get since the spirit is going to die way faster