HotS II: trying to use Swarm Hosts

So last time I whined a lot about the Swarm Host and how it was virtually useless. As usual, I just wasn't using it right. 

To be sure, having three micro-intensive units (Swarm Hosts, Infestors and Vipers) is above my relatively useless skill level (check out this Terran wall! Am I gonna build Banelings or Roaches?  Nope!). But I've found two uses for these guys, one of which is less risk-intensive than a similar strategy I tried using in Brood War with Lurkers. 

Basically, you bury them on high ground near (but - and I can't stress this enough - not in) the enemy attack lane, and rally the Locusts to the far side of the attack lane.  The closer they are to the enemy base, the more warning you'll have that the army is on the way and the more easily you'll be able to use them for base harassment once that army is dealt with.  On the other hand, the closer they are to your base (or at least your army), the easier time you'll have saving them in the event that the other player has detection (and he better have detection - you're zerg) and decides to hunt down your Swarm Hosts. 

There was another game on Crossfire where I used them to harass an enemy's third while I went after his natural.  Since his army turned around as soon as I started attacking the natural, the Hosts were able to wipe out his third and then take that upper corridor towards his main, tear down those destructible rocks, and swarm in from the side.

One thing that HotS has definitely done to my Zerg build is force me to tech to a Hive as fast as possible, because my favorite new unit is hands-down the Viper. "Oh, you just blew 400/300 on a nice shiny Battlecruiser that you're keeping on the edge of the battlefield and trying to repair with SCVs on the high ground? Here, lemme just drag that baby over into the middle of my Hydralisk swarm." "Oh, you went through the trouble of properly micro-ing your units so your Siege Tanks were in the back of the line?  Yoink!"  "Hey nice Thor. Let me drag you away from my Ultralisks and into the middle of my Zerglings."  "Oh, I wasn't paying the macro any attention whatsoever, got curbstomped, and now all I've got to defend my base are a bunch of Speedlings and a Viper?  Blinding Cloud."  Go ahead and ask me if I'm even using Infestors any more.