Your resource priority is mana rocks first, then a recursion outlet, then a payoff like Imotekh or Shard of the Nightbringer
The former will only be awarded once and includes various items (Hourglasses, Shop Tickets, Shinedust), while the latter requires the player to complete a specific objective in a battle to earn further resources
Most decks can benefit from a fog effect somewhere in the 99, but most decks wouldnt want to spend a full card slot on it
You simply just accelerate right past your opponents, and get a creature to boot
(You expend 4 as you spend your fourth total mana to cast spells during a turn.) Bushy Bodyguard One generic, one green creature Squirrel Warrior 2/1 Uncommon Offspring two generic (You may pay an additional two generic as you cast this spell
The latter is less problematic as we tend to give you some tool usually a card or counter to help mark the change