I STRIKE COMBO BUILD
This equipment build suits to his burst capabilty. In addition to Blade of the Heptaseas, Sky Piercer is a good partner for him to dominate the game. It's easy for him to burst support or marksmen heroes mid-late game
GROCK DMG BUILD
This emblem set is best for him to dominate his opponent in his lane especially in early games because of the master assasin talent he has advantage with single hero enemy.
Battle Spell
Despite Grock has advantage with this damage build because of his slow movement speed with this chosen speel it's easy for him to disengage teamfight and also chase enemies thas has slow hp.
Before Level 4 and Turtle contest
Before level 4 grock must get his creep wave fully maximize and teamfight engagement is not necessary, as he unlocks his level 4 skill or ultimate, it's easy for him to check bushes and burn enemies skills for an easy turtle or any objective for the team.
Best With Moskov
Moskov is a hero with mid range and with Grock's assistance he can put a wall and give Moskov a protection from melee enemies trying to chase this marksman hero. Grock also has the capability to zone opponent so moskov has the high chance of being protected early-late game.
Watch Out For Diggie
With Diggie's Second Skill, it's difficult for Grock to escape and engage at the same time. Having Diggue in the opponent's line up is a headache because Grock will have a hard time in his skill combo because of Diggies ultimate skill, Grock can't maximize his skill.