This build was reviewed on patch 2.1.67; the current patch is 2.1.90. Item stats may have changed. Check the latest patch notes before copying it.
Advertisement

Tough Boots replaces Warrior Boots
Use when stuns and slows are stopping Grock before he can place Earthen Rampart.
Athena's Shield replaces Radiant Armor
Use when a single burst mage decides fights before Radiant Armor can stack value.
Blade Armor replaces Guardian Helmet
Use against basic-attack marksmen who must hit Grock while he zones the wall corridor.
Snowball roam variant for games where Grock can repeatedly tag isolated targets with Thunder Belt, Dire Hit, and Execute while still scaling through defense.
Combined Stats
6/6 slots
Total Gold
10,750g
Conceal Wall Engage