Action changes to:

[Seraphor]

Give ActionA the effect "Triggers the cooldown of ActionB upon excecution." Put ActionB on cooldown for 0.5s when you use ActionA. This is long enough to prevent you from activating ActionB unintentionally unless you're being super overzealous with your button mashes--in which case, be less overzealous with your button mashes--but short enough that you can still double weave ActionB if you want to do so intentionally.

Unfortunately most oGCDs consume about 1s (but can also be queued slightly less than 1s before, hence why hammering the button could cause you to hit it again accidentally) which is why you can't just quintuple weave skills like a machine gun, and can only double weave most skills.
This means adding a 0.5s cooldown would bring a double weave cost up to 2.5s. Any amount of skill/spellspeed, or ping, will cause that to clip.