Which champions who relied on mana pots also took Expanded Mind?

With Expended Mind (25/50/70 starting mana) not carrying over to next season, the 50 mana, 3 less per level changes might not do anything. I don't know which champions stuggled enough where they needed both extra mana and mana pots due to my champion pool. Doesn't this seem counter productive? Some champions are potentially losing mana even if they get the compesation.

For those of you on the PBE, is the change noticeable? Does meditation 2.0 make up for it? Who seems to have been hit hardest?