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I'd have to see a replay to figure out whats strong or weak in it, I'm having a hard time picturing how it could possibly work.

Starting off with early ghosts against toss was a short lived fad I thought, where they would harass your worker line with cloak and snipe for a bit, but most found it's weaknesses far outweighed it's strengths as getting early ghosts weaken your economy and army size early on.

The mid to late game ghosts make much more sense to deal with protoss immortals, archons, sentries and high templars and use the emp as snipe isn't terribly effective against toss.

So until there's something out worth emping it doesn't seem like the greatest choice.

Then to wait until you've got your ghosts, and tanks, and siege mode before expanding, sounds like they should lose right there, and toss should be on 2 bases for a good while and already looking at taking a third if they haven't already, expanding with just a small bioforce of marauders and marines, with a couple of bunkers, and skipping the early ghosts to get faster tanks + siege sounds like the more optimal choice.

Thors are good in any composition, but I think more tanks + mid to late game ghosts and lots of upgrades would be better against protoss, Thors are really effective against zerg, but I'd imagine, that with the use of immortals and stalkers, they wouldn't be as effective. With the exception of being able to stomp out force fields of course, so perhaps a small number of them to help when pushing out would be a good idea, as it would decrease the toss ability to instantly create positions that favour them so that they can massacre armies in small groups while not taking very many casualties.

I dunno though, I'd have to see exact timings, and what they do with their units to really understand how the build could work effectively, but from the sounds of it, it really shouldn't work.

as a toss i usually go for a stalker death ball and mix in either collosi/immortal,
collosi/void ray, or carriers. against me i have rarely seen ghosts put to much good use since i don't normally use high templars, archons, or guardians and i often get observers fairly quickly, along with cannons watching my front/entrances and armor ups. So i'd say nay on the early ghosts but yay on the early and constant scouting, as for the rest of it don't build a thor eccentric army since immortals have the range upgrade and ultras are more strategically plausible and both could shred through thors. though late game thors might be effective against terrans as long as they don't have numerous ghosts and tanks to feedback&siege them.

That's a pretty bold question/statement to make. I see where you're going with it, but would you mind explaining why you asked the question?

im asking cause of that statement "I don't see ghosts too often" I'm sorry if you got the wrong impression. I myself am only in silver.

anywho, its to my understanding that ghosts win the tvP match-up. Personally, PvT is my worst match up and i can lose to just about anything, but 90% of the time a ghost in involved one way or another. It strikes me that Ghosts are not used to gold-plat. I'm at the point where my MMR pins me against gold and sometimes even plat, and come to think of it I never face a terran gold or terran plat.
My friend whos plat, but his MMR puts him against dia and low-mid masters says that ghosts are unbelievable in those high ranks.

But why? if you are going a mech-ing building, similar to the one i mentioned, 1 EMP rids an Immortal's shields, and thats huge.

I see, in your opinion, do you think this build counters something like zealot archon? or is it just impractical?

This build being just ghost mech in general, or the actual build stated above, because that build up top, like I said, I don't think should work very well against anything.

Ghost mech is really good at dealing with a lot, it would destroy zealot archon of course, it would wipe out at sort of sentry advantages they could get, it can take out high templars, and of course, having emp against protoss can always be helpful, no matter the composition.

I don't really like to think in terms of countering builds because in the end, a presumably weak against X build can still win against against the 'stronger' Y build based on any number of factors like economy, position, micro, upgrades and timings.

So to say if any one build counters another is kind of touch and go, as you can't really say one way or another, it's all a matter of what you do with it, how you do it and when you do it.