Since being the monarch gives your opponents a great reason to attack you, you need to give them even better reasons not to
The two loyalty walker you are left with should you use her to kill something right away is very easy to kill, slow to regain loyalty and not that threatening as something to have in play
But that's why Brainstorm is best friends with the fetch lands: If you don't like what's in your hand, put it on top of your library and then have a fetch shuffle it away
As a Planeswalker, Ajani can draw attention away from the player themselves, even if the player never gets to activate his ultimate ability
You can sacrifice that Junk token to impulse draw the top card of your deck, effectively letting you draw extra cards for each attack
There are also plenty of ways to return cards from your graveyard to your hand or the battlefield, so be sure to take care when casting these cards to ensure they can resolve and have an impact on the game