Here are my suggestions:
General Guide these days has changed a bit because of the changes in AI and a few new cards.
First AI3 Deck: Mono Rush,
all can get you a 98% to 100% win rate
Skip AI4
Go to AI5:
RoL/Hope is the old school recommendation.
Limitless Speed is the new school recommendation.
I recommend limitless speed.
After that, with the money, and ups and rares you win.
Break into more shard territory by building a couple of the best shardless Gold and Silver farmers.
Grind for shards and more cards:
Build Pdials, VoodooBravery, and Malignant Balls.
Grind Plat and AI5 when you want to, Start with Plat each day and see if it favors one of your decks, if it does, stay, if not, switch to FGs.
For Fun: PVP2, and Forum Events, at least until 1.4 comes out.