Chronicon Arpg is the best in this regard because skills (most have cooldowns but not all) are on a priority list.
If you bind the same button to different skills their priority, the order of activation when you’re holding the button is the same as the order on the list.
In case of Grim Dawn ABB would have higher priority / position on the list and activate as soon as off cooldown delaying Fervor.
Binding multiple skills to one button works pretty well in Chronicon since you can set this priority.