There should really be a tank item with the "restore 15% maximum mana back on kill/assist" passive

tanks really have some of the worst mana regen in the game, really expensive mana costs on abilities and CDs, but don't have room in their builds to get a mana regen item.

One of the worst feelings is being ahead in a long teamfight as a tank, and your trying to finish off the last couple of enemies, but your oom with your small mana pool and lack of any sort of regen. So now your basically a walking meatshield since you have no mana and your basic attacks don't really do much.

There should really be an item that has the restore maximum on kill/assist passive from grail, but made on an item for tanks. At the moment, tanks really have 1 good option for mana, frozen heart, and then 2 lesser options, in gauntlets and righteous glory. If they are a laner, they can get RoA, but thats not an option for junglers or supports who have to finish other items first and can't rush RoA to get the timer done ASAP. And tanks have no legitimate options for mana regen.

There should be a health+mana+MR item that has the restore mana passive. It would really help tanks, both with mana and with another MR option, of which the game is severely lacking