User blog comment:JmLyan/Aeon, the Guardian of Time/@comment-5764087-20130423164715/@comment-7481207-20130423191013

The ult suppression can be avoided both by damaging him while he is channeling or by being out of sight when he stops channeling though. And his gap closer is only targeted damage, as opposed to all the various effects gap closers have in the game, such as AoE on Kha'Zix and Xin Zhao, damage reduction on Katarina and on-hit effect applying on Fizz.