Theres still room for off-color or non-mana plot costs in future sets, but in its first set, we also already see a couple of cards that trigger some ability when plotted
You also have Poppet Factory and Dress Down which work favorably with decayed zombies and let you keep them around for additional attacks
(Back to that in half a mo.) Once you choose your path, you will be provided a Prerelease Pack that looks like this: To help you choose the path that rocks (for you), here is a helpful table: It is important to note that the path you choose for a Prerelease only applies to that particular Prerelease event
Thats still true of the Crystals, but more decks will want those for their secondary effects, and just consider the cost reduction a welcome bonus
The right commander is probably Imodane, the Pyrohammer, who can spread your Burn spells out across all of your opponents to speed up your clock, but Ojer Axonil is a great alternative