Just my .02 on your deck building strategy... take it or leave it...
from a financial stand point, 99% of cards in standard will not hold their value after rotation so, it's not advisable to pick up multiple copies of things like precinct captain for example... something like thoughtseize will hold some value after rotation and even after theros stops being opened so much it'll see a rebound.
I realize that we all play for different reasons, but it doesn't make sense to spend time trading/buying cards that you'll lose out on for a hobby. even if you have the extra money, that's still really a waste of your time and effort to trade for something you don't really "need' to play with.
I usually get my play sets and then maybe build a different deck from one week to the next.
Just something to think about.