Random thought about Garen
Why doesn't he gain Tenacity/Slow Resist/Movement Speed against or at least while chasing down the Villain?
It could probably be a sizable buff, yes, but Garen's not exactly in the best place at the moment (though tbh we should wait and see until post Assassin Update) and at the very least this would be a buff that makes decent sense on him thematically as well.