I was just explaining how it would help to deal with chandelure because that was the pokemon you said ( the same applies for Mamoswine unless they work out that they can break the sub with earthquake the hit it with ice shard). There are some others it benefits from outspeeding - jolly gyarados and dragonite and adamant haxorus. Although looking through the speed tiers there is not much else that it needs jolly for, so adamant may actually be the main option.