While opting for low mana value cards and modal spells and taking plenty of MDFC lands can help to decrease the chances of missing out on those top decks, you really do need to sit down and apply some math here to get a smooth running machine
Fire Magic Rating: 4/10 Fira on its own is a card weve seen many times before, and its generally playable in any non-aggressive red deck
That means this card can blow up in enchantment heavy decks, even in Standard
While mass Goad is definitely the selling point for playing Marisi, don't forget his first line of text: "Your opponents cant cast spells during combat." Why yes, I would love to have access to a strictly better version of Basandra, Battle SeraphBasandra, Battle Seraph's static ability
The other activated ability the creature must have can be any activated ability, including one that can't be activated at the moment, or even one that can't be activated while the creature is on the battlefield