I've told myself for a long time that I'm going to revive this once I hit level 50, and I've finally done it. This time through I'll put up my decks as soon as I create them. I've also changed the thread title.
For the past six months or so, I've been RNGing an element for most cards I get, except those which are duo-centered, and building a deck focused around those cards. Usually, this leads to a mildly interesting deck, although sometimes I put up a less interesting deck depending on the oracle card I get and my current state of mind. I will never put up an oraclebow - if I do put up a rainbow, it will be heavily centered on my oracle card.
I have quite a bit over 200 upgrades spread around the Elements, and I gain more whenever I have the urge to grind, which isn't really often.
The screenshots I take for the deck image are 360x240.