Mages =/= The sole users of Sorc.
I dont know where people got the idea that each role "owns" one tree and the other trees are for diversity.
ALL the trees, your primary, and secondary are for diversity.
Im sick of seeing "Why is THIS a mage thing?"
Its not a mage thing, its a sorc thing. Its put there for the keystones next to it.
Mages never OWNED ultimate hat. And (this is coming from someone who plays mostly mages lately, and loves Ultimate hat, and utterly despises ever mid lane assassin in the game except talon) It was moved to Dom because assassins NEED it. Assassins kill pressure are based FULLY off of their ultimate cooldowns.
Another bonus of this change however is... as a mage player... I was always at a lost at what to take second. Presence of mind is the only useful mage rune in precision unless you want AS for last hitting. Most of Dom is kind of meh, but some extra healing from taste for blood is nice. Resolve is always okay if you wanna be tanky, but that isnt always the case And inspiration is inspiration, it was useful for dematiralizer for the wave clear (at least i liked that rune) and bisquits are usefull, so is CDR.
However with the change, Mages can go electrocute and have more use out of Dom then before and go secondary sorc (or anything else) Or if you are primary sorc you can get ultimate hat AND something else that was in that line... like MFB. you just have to go secondary dom.
I have no idea why all of these posts are coming up about "Why did rito take UH away from mages?!?!?!?" The point of runes reforged was to have choices. You arent 100% required to go down Sorc, and in fact i think they want mages to go down sorc+dom or dom+sorc anyway since the base stats grant only ap.
Thats also why Sorc have movespeed runes (want to roam or have increased speed to lane, go secondary sorc.
So basically... can we stop making posts about Riot ruining sorc by moving things around, you arent entitled to anything in sorc because you are a mage, thats not how Runes reforged was trying to do. By all accounts feel free to complain about the usefulness of Comet and Aery, Or runes being replaced by something objectively worse. But not about things being moved out of a certain tree to move into another.