Allow Expert Skills to use Attack and Defense Relics.
Why not Enhancement and Group?
Let's see:
Attack Relics:
They usually have a chance to decrease some enemy statistics. Some cause debuff, example:
Chance to stun, poison, etc.
Defense Relics:
They usually have a chance to increase some statistics. Some also cause debuff, for example:
It leaves a buff on itself. If an enemy attacks you, your magic damage is reduced.
What about the Improvement and Group Relics?
Enhancement Relics:
They usually give some additional effect to the skill, example:
Give more damage, more critical chance, chance to use the skill again, etc.
They are almost always more expensive.
If Expert Skills are already good WITHOUT these relics (to the point of having a small cooldown on all after using one), imagine WITH them?
The same with Group Relics.
That is, Attack / Defense Relics help with buffs and debuffs, almost always passive, while those of Improvement improve the skill (as the name says).
When using AaDR* in Expert Skills, it would only give you more chance of getting such buffs.
*Attack and Defense Relics.
Thanks for reading!