I wonder if the scale doesn't go high enough. It's hard to say because it's not clear what the goal of "disagreeing" is. If it's to convince the other person of your own perspective, then I humbly submit that none of these is likely to get you there.
What about the dialectic? What about appealing to common values or goals, and drawing connections between these common values or goals and your own argument? Maybe these approaches are too large in scope to be contained -- or, for that matter, likely to succeed -- within a single comment or comment thread, but I believe it's "higher" on the scale and, when practiced well, more likely to pursuade others than simply demolishing their arguments or employing the other tactics on down the list.
What about the dialectic? What about appealing to common values or goals, and drawing connections between these common values or goals and your own argument? Maybe these approaches are too large in scope to be contained -- or, for that matter, likely to succeed -- within a single comment or comment thread, but I believe it's "higher" on the scale and, when practiced well, more likely to pursuade others than simply demolishing their arguments or employing the other tactics on down the list.
Or perhaps I've missed the goal of the essay?