User blog comment:JmLyan/Chroxus, the Herald of Time/@comment-5663427-20140831211359/@comment-7481207-20140901160328

I understand your reaction, and it's because of a mistake i made when wording the passive. You logically assumed that damage is dealt when an ability is cast and then again at the end of the cycle. However, the correct behavior is that damage is only dealt at the end of the cycle. Thus Chroxus deals roughly half as much as you thought he does.

W can indeed stun for 2.25 seconds, but this requires decent timing, can only be done near the end of a cycle, requires him to use his ultimate and can be prevented as he needs to cast W to additional times after the first cast, CC would prevent him from doing that. It also has a tradeoff in that you cannot perfectly chain the stuns together while also getting maximum damage from E. It also costs a boatload of mana to use the triple stun early game (250).

For E to last 15 seconds, you must cast it 3 seconds prior to the end of a cycle, cast E again 3 seconds into the next cycle, cast your ultimate 6 seconds into the second cycle, and then cast E once again in the third cycle, with every time you cats E you have to be in auto-attack range. No enemy champion is going to let you get that full combo off (except maybe bots), and while he has stuns to lock the enemy down, the large delay between every cycle this combo requires spreads the 2.25 seconds stun into mini-stuns at three occasions.