New Disruption Tank Idea

So I was just thinking, came up with a cool ult I thought would be nice for a tank or support, and I just wanted to put it out there before I forgot. Enjoy or not, I came up with the rest of the kit on the spot. Don't make fun of me for not being able to format btw . . . Passive: I really don't know what to put here . Q: Begins a 3 second max channel, rooting himself, increasing distance of ability up to a certain range. After channel, charges in a target direction almost instantly. The war cry he yells while dashing fears enemies for 0.25 seconds. . . . Disruption tank ftw . W: Spins with arms around him, rotating enemy champions 90 degrees from where they were in relation to him, counter clockwise. Damages enemies, scaling on AD. . . . Just adds on to his disruption . E: Smashes the ground instantly, dealing small AOE AD damage and slowing enemies. Can recast again twice, the second cast having a 0.5 second long cast time to increase damage done and slow strength. Third time has a 1 second cast time, large AOE AD damage, and stuns enemies. . . . This ability gives him the reason to stay in the middle of the team after disrupting, as well as his teammates a chance to follow up on his dash (if it's a long one) . R: Begins channeling in place, like Nunu, but instead creates a large bubble that is exitable and enterable by both allies and enemies. He loses most of his Armor and Magic Resist, but however much he lost of each stat grants that amount of each stat to all allies in the bubble for the duration. Over the course of 5 seconds, he builds up 5 (or 10 or 15 or 20 or whatever would be balanced) armor per second until the end of the channel, where the allies lose the bonus defense but he keeps the built up defenses in addition to his base armor and magic resist for 10 seconds. . . . Now, I realize that this is a strong ability, and there's almost no incentive for the enemy team to ever enter the bubble to encounter the buffed enemy team, so a few ideas I had to give enemies an incentive to enter is:

1. If he is killed during his channel, gives some kind of debuff to his team. Maybe lost AD for the same amount of time, or lost defenses, or even damage dealt to them based on channel time.
2. Could have make it so that he has a passive that makes him get less armor/magic resist from items but if he gets the full channel of his ult, he gets full bonus defenses as well as the built up resistance from his ult.
3. Could grant the same buffs to the killer or their team or something along the lines of the defenses going to the other team