Some help vs T3 artillery

[rtc]

T3 artillery costs 70.000 mass. that's as much as 3 monkeylords, or 2 soul rippers!

so the question is - your opponent just spent 70.000 mass on a building. while he was using all that build power and mass on getting an artillery up, what did you do with your mass and build power?

assuming equal mass income and build power, you could have finished a monkeylord (or a GC, or a fatboy, or a seraphim t4 bot) before his artillery is even half finished, then casually walk it into his base and burn it to the ground.
or you could have finished a soul ripper when his artillery was about 1/2 finished, then use it to rip through his base, including the half-finished artillery.
or you could have made 20 strat bombers by the time his artillery was 3/4 finished, and used them to blow it up in one single bombing run.

what i want to get at: by far the best way to 'defend' against T3 artillery is destroying either the artillery or your opponents commander before it is finished. there are a lot of ways to do that, and many of them are much faster and way less expensive than building a T3 artillery.

but, once the artillery actually finishes building and starts pounding your base, there is not much you can do to save your buildings. these things are called "game ender" for a reason.