Anti-Juggernaut item for Immobile Mages

Riot has said that they are continuing to rework champion classes as they did with jugernauts and ADC's, and I have heard that immobile mages are scheduled to be looked at in the near future.

With the tank meta still a very prominent force in games, immobile mages have severe problems with staying alive as they can be solokilled by essentially any tank/juggernaut past level 16. Riot gave AD carries a tool to deal with high health enemies--namely and --but mages remain relatively defenseless with their only real antitank items being , , and to a lesser extent .

Therefore, I would like to suggest an item to help mages deal with juggernauts.

Working Name: Seismic Staff Cost: 2550 - May need to be increased, I used as a reference point as it gives similar stats Builds out of: + + 500g

Stats: 70 Ability Power 45 armor

UNIQUE Active - displace: (working title) Target champion is knocked back a distance of 100 units plus 1 unit per point of the target's bonus health. Targets cannot be knocked back more than 750 units (90 second cooldown).

Active Range: 400 units

Obviously the numbers will need to be tweaked but I would be really excited to see how it could work as a real item and would like it to be experimented with.

Edit: If it becomes a problem with mobile mages, it could be made so that dashing puts it on a 1-2 second cooldown.