Which Tier this should be in is still debatable but I was thinking of this:

Phase 1: King Krogmo jumps around trying to crush unfortunate knights, after a certain length of time he stops and summons a bunch of knights he has captured though the years! in this Phase they are all T1 and easy to kill. During this stage King Krogmo is able to be hurt by weapons, once he has taken a
certain number of hits and all the captured knights are dead he enters Phase 2

Phase 2: King Krogmo Jumps back into the middle of the arena and starts swinging his cane much like Vanaduke does slamming it on the ground to crush the poor knights, when a certain time passes he summons T2 knights and T1 knights together. Once all the knights are dead and King Krogmo has taken a lot of damage he enters Phase 3

Phase 3: King Krogmo jumps around slamming his mace down when ever he lands killing any knight under it. After some time he stops and summons T3 T2 and T1 knights to defeat you. Repeat ends of Phase 1 and 2.

I'm free for any suggestions!