Blitzcrank is one of the best carry supports in League of Legends. He’s a support that punishes immobile champions, such as Senna, Aphelios, Lux, and Karma—all of which are champions that lack dashes. Blitzcrank fits perfectly into this meta by punishing them if they have no flash.
Aftershock: This is the best keystone to make you deceptively tanky. It allows you to safely engage onto enemies with your hook or knock-up and survive the encounter. The bonus armor and magic resistance will ensure you survive the trade and get away with a healthy amount of resources without getting blown up.
Demolish: Demolish is a great rune to take down towers fast. As Blitzcrank, your kit doesn’t do much damage to towers, so having this rune is a must if you want to be able to take down towers fast. It will give you some early gold if you take down plates and help you and your laning partner to snowball.
Bone Plating: This is a basic rune to grant you more tankiness early on and in the mid game. You aren’t going to survive a lot as a melee support, especially early on. Your goal is to hook enemies into you so having some extra damage reduction is always welcome.
Overgrowth: This rune is perfect on a melee support. The longer the game goes, the more health you’ll get. It is easy to stack; all you have to do is stick close to minions dying but the effect will be felt in the longer stages of the game.
Biscuit Delivery: This is a must-have rune for for melee support considering how easily you’ll get poked early on. It allows you to regain back some health and mana and stay in the laning phase for longer. Also, it will solve mana issues due to you spamming your hooks early on.
Cosmic Insight: This is a great rune to ensure that you can use your abilities and summoner spells more often.
Bonuses: +10-percent cooldown reduction, +6 armor, +15-90 health
Starting items Steel Shoulderguards
Having the extra AD early on is crucial for you. Steel Shoulderguards grants you the AD you need for favorable trades and a great passive to help you sustain your AD using minions. This support item scales freely with the gold income generated by it.
During the farming phase, you’re going to take damage from enemy champions. Health potions heal back 150 health over 15 seconds and will give you extra time before having to base.
Core items Mobility Boots
These are one of the best boot options for a support. They allow you to cover huge distances over a small period of time, which is perfect in this roam-heavy meta.
Zeke’s Convergence is the cheapest support item, which is easy to rush to amplify you and your bottom laner’s power. You can make use of the effect quite often considering the low cooldown on your ultimate.
Once you upgrade your starting support item, you won’t be needing the yellow trinket ward anymore. Swap to an Oracle Lens once you’ve earned 500 gold to upgrade your support item for free wards and use it to deny vision from the enemy.