We find ourselves disagreeing about how fast Kyurem needs to be. Kyurem ties with Gliscor so unless it needs to outrun it any cost I see no point in running maximum speed. Jolly CB-Cube with SR can damage analysis-Gliscor with Outrage to the point it cannot create subs anymore and should Gliscor try to keep up in terms of speed, it might die (Impish) or will die (Jolly).
As for the other spreads, I see want you did. With 236 EVs it is faster than +speed 80, namely Venusaur, Dragonite and Mamoswine. We probably have to decide for ourselves how reasonable it is. Venusaur is not really a threat to it and the stats suggest that the majority of Dragonites are adamant. It doesn't have to stay that way because there is a rise in jolly Mamoswines in the Suspect Ladder compared to standard OU. Maybe because of Kyurem?
56 EVs are for Politoed and Breloom and should be the minimum amount of speed you have, full stop.
There are two other distributions I want to suggest - they make it as fast as a Gliscor of mine would prefer:
Neutral 148 put it in a very good speed tier above Breloom and Politoed and is very good for substitute sets.
216 is for me the more offensive approach for it being faster than Lucario.
Are there any objections?