Mind Crush

Is it worth main decking a Mind Crush or two?

Let's list some of the top decks (in no particular order):
-Lightsworn
-Blackwings
-Gladiator Beasts
-Vayu Turbo
-Zombie Synchro

Now, let's list some of the ways that Mind Crush can help against them:
-Lightsworn: Honest, whatever they search with Charge of the Light Brigade or what they retrieve with Monster Reincarnation or Beckoning Light.
-Blackwings: Kalut, whatever they search with Black Whirlwind.
-Gladiator Beasts: Whatever they search with Gladiator Proving Ground or Samnite or what they retrieve with Equeste.
-Vayu Turbo: Burial from a Different Dimension.
-Zombie Synchro: Burial from a Different Dimension.

Against the first two, Mind Crush is an amazing card. Against Gladiator Beasts, it's somewhat useful. Against the last two, it can't do much.

With Zombie Synchro, you can mess up their planned swarm by Mind Crushing their Burial from a Different Dimension. If you miss, (which is rare, since they normally wouldn't attempt an OTK unless they had it), then you know that you'll live to the next turn (provided you have a decent amount of LP). Either way, you keep it out of their hand.

If you're able to hit a Burial or two, then you're pretty much safe for a little while. Zombie Synchro has some difficulty OTK'ing without it, so you can take advantage of the situation.

Maining Mind Crush can be a little risky, and of course it depends on the metagame in your area, but it can pay off. You can spring a card on your opponent that they wouldn't expect in the Main Deck, and it also frees up space in your Side Deck.