Hi,
in view of the forthcoming class balancing, I would suggest to implement new setskills for Inferno of Divinity, Gorge of The Ice Giants and Realm of Fogotten Legends.
This could make it easier to balance certain skills/classes.
But I want also mention, that one new (or more than one) slot for set skills would be needed. Some classes don't really need 5 slots atm and other classes would need more than 5 currently.
Greetings