What they need to do is..
Relic weapons are for 2hr's.
Empyean weapons are for weapon skills.
Mythic weapons are for Abilitys.

Now if you check mythic weapons they already support abilitys
Now if you check Empyean weapons they support weapon skills mainly and main phy dmg.
Now all they need to do is adjust Relic weapons and make it a Boost where your 2hrs are 20min recast timers and they do 3 times the damage or boost then this will be good weapons again but not for weapon skills but for 2hrs. Good weapon to swap in before you 2hr. 300 Hundred Firsts anyone? Pld 2hr lasting 3x longer.... fastcast lasting 3x longer. Bard 2hr doubling the song effect.