There are some out there that have memorized hundreds of builds, and then watch you for a few seconds and instantly know what you are using, and whether they are able to counter it (if they see something they don't recognize, they will just click on you to see what skills you are using and then bring a build to counter yours the next time around).
Ugh. You're right. As addicted as I am, there are plenty out there who take this game to an even higher level. Similarly, my uncle told me never to play cards with a firefighter...
So, I won't get my impregnable shrine fortress, but with a combination of decent build and decent strategy, even noobs like me can be effective, though not invulnerable. Thanks for the ideas.