Increase your Tenacity and Slow Resistance for each summoner spell on cooldown. Immediately after casting a Summoner Spell, gain a larger burst of Tenacity and Slow Resistance for a moderate duration.
Aftershock's massive early-mid game tankiness allows you to trade aggressively without risking your life to do so.
WhyDemolish
Demolish on Pyke allows you to snowball lane kills for early tower damage and team gold advantage.
WhyBone Plating
Bone Plating further empowers your ability to take aggressive trades early. As Pyke you are often diving in to deal damage and Bone Plating can go a long way in ensuring you make it out alive.
WhyUnflinching
The extra bit of Tenacity from Unflinching is huge for allowing you to move freely in fights to deal damage on primary targets and find executions with [R].
WhyBiscuit Delivery
Biscuit Delivery further empowers your ability to sustain poke and take aggressive trades with the added sustain.
WhyCosmic Insight
Cosmic Insight's general utility to great to empowering your ability to get multiple [Q] and [E] CC rotations off.