Guys, I know this is a weird way to do things but hear me out.
Listen, let the game design shit all over us mages for half of a season. Look at ADC's back in 2017.
They will quickly realize that they fucked up and over compensate by reducing the gold cost of three or four of our core items by 300 gold each.
And then also nerf the MR on other items, while gutting the stronger classes because "Mages" feel too weak.
I am completely for this change.
I'll explain.
1: Yes we lose base mana and mana overall. It doesn't effect our early game too hard. I am for that.
2: Blue now needs to be given to the mid laners. You'll notice that junglers that give blue to their mid laners that need it will have a higher success rate than junglers who just take the blues.
3: Champions that currently sit around and spam wave clear will be hurt a bunch by this change. Its actually extremely good. Wave Clearing roamers are hurt. Wave Clearers are Hurt. It forces some massive trades for trying to roam. As the game progresses. (saying your bot lane doesn't feed to fucking hell before 10 minutes, which is a rarity I know)
4: This opens up assassins to be dominate again, but not in the current style that we all remember. It allows them to build up pressure much easier now. Because mages have to watch both sustain of hp and usage of mana. Meaning that once you are in a 0 threat range they gain dominance.
5: This will force Game Design to take a look at things that are insane, such as manaless champions that are already strong. Vlad (not sure atm, getting back into the game). Akali with her stupid fucking healing. Kata with her unlimited shunpo. Zed with his high damage. Yas probably won't be touched.
TL;DR
Let Game Design fuck up mages for half a season. If you accept it now, its easier to swallow the pill and be like "Well, I tried my best. Its just my subset of champions suck at the current moment." Then when they go back around and give us over compensation, we can come out and completely make everyone cry for our misery. Just like ADC's did back in ADC's in 2017 lul. Cause Ardent happened right after that :D
needs his blue. 
then you can give your blue to mid laner.
but most junglers cant... and scarner isnt even AP.. you try to take blue from
, you'll never get a gank the rest of the match...
Takes his blue and his opponent's blue every game.