What should I do as Z against T mech? I'm in the Diamond league and I've yet to beat a single T player that has gone thor/tank.
I can't go mutalisks because by the time I get about 6 of em out they have at least 1 thor which easily counters. I've tried all in muta, I've tried roach/dra, pure dra, roach/dra/infestor.
Pretty much all that happens is if I try to muta harass the thor drives me out, if I try to contain with ground units, sieged tanks on the ramp push me back so they're free to expo. Once they get a single expansion they can easily pump enough thors and tanks/hellions to just walk right over me.
I can't get cute with neural parasite because tanks easily demolish anything on the ground before I can even get in range. I need replays/youtube videos of phase 2 ZvT mech, cause I'm completely out of ideas, and I literally have not won a single game where the T player went thor/tank/hellion.
Um, are you using burrow at all? Burrowed roaches > sieged tanks.
Burrowed infestors can also get close enough to NP.
I don't see how you can have a getting in range problem using burrow unless your opponent has ravens or turrets up. If you don't go muta, they probably won't get too many turrets, if any.
Also try and flank unless they are holed up in their base. If they are holed up in their base, play the macro game.
Late game, Broodlords can do quite a lot, even thors have a tough time dealing with them because the broodlings confuse them.
Ultralisks can take a fair amount of hits too, even though most people never use them.
You could also try nydus worms into their base, at least as a distraction.