Tvp mech test map help

Does anyone have good opener and game plan for tvp tank mech in test map?

I've been playing mech only since hots and have been doing cyclone mech in lotv but I've been stumped in tvp in the test map.

It seems like I have more trouble than ever vs a gateway-archon-immortal army (not to mention carriers) even though I should be handling the composition a lot better than I did in hots since tanks were buffed.

Strangely enough, I find myself getting overrun or crushed by the gateway-archon- immortal army quite often even though tanks are way stronger now...

Its quite baffling since I should have more tools than I did in hots to deal with the same army and I seem to have more trouble than I did in hots!