Combo Action Button

[Rongway]

Now riddle me this. After using Impulse Drive and enabling use of Disembowel, for what reason does Impulse Drive remain on my bars?
I will never consider using Impulse Drive twice in a row. That would be a straight dps loss, not to mention screw with upkeep of BOTD. There is literally zero purpose to Impulse Drive once I've cast it and moved up the chain. All it does is consume a hotkey and button space.

But the point is you can make the wrong decision and use it twice in a row, and indeed some people do--especially when they're still learning a new job.

This is not like conditional or mutually exclusive abilities, which you are literally unable to use under the wrong conditions.

Example: You cannot use Between the Lines unless Ley Lines is active. You cannot use Ley Lines while Between the Lines is usable, because Between the Lines is only usable when Ley Lines is already active. Therefore these two actions should be the same button. This is not like advancing a combo, where it's possible to abort or reset the combo for whatever (usually bad) reason.