@Riot New Runes for Sustained-Damage Mages

I am just wondering how the new runes will affect mages which deal sustained damage. From what I've seen, these new runes provides something new to champions like Assassins, ADCs, Fighters, Tanks, Roamers, Burst Mages, and Supports.

However, I don't see Keystones which provides as much benefits to Sustained-Damage Mages such as , , , , etc. Press the Attack only stacks on Basic Attacks. Some of these champions don't have hard CC so using Arcane Comet is unreliable. From videos I've seen, Aerie is mainly used on Supports and it still takes a while for Aerie to return, making its overall DPS fairly low. Phase Rush requires 3 SEPARATE abilities and/or basic attacks so it's better for burst champions, but even if it only requires one ability to hit the same target three times for the Keystone to kick in, it just got nerfed recently.

So I was wondering if we will be able to expect something that can benefit these kinds of Champions as the new Keystones seem lackluster primarily to them. I even explored some of the Reddit pages for most of those Champions and I've been seeing their mains having trouble deciding which Keystone will benefit them.