It's easy to make your build safe vs this

if you get mocore after your first sentry and then throw down an early robo (you want fast colo anyways for swarm host and hydra) you have zealot mocore sentry cannon with an immortal in the pipe and with my build 4 gates finishing up.  All i have to do is ff throw down two extra cannons (which i usually cancel) and chrono the immortal.  It was a good build in WoL vs greedy toss but in HoTs mocore just makes the hold too easy.