Some of the best cards to pair with Najeela, the Blade-Blossom include: Champion of Lambholt makes blocking increasingly difficult Mindblade Render turns your attacking Warriors into card advantage at a cost of 1 life Derevi, Empyrial Tactician enables an infinite loop if you get to untap your lands after each hit Ragavan, Nimble Pilferer provides Treasure and card advantage early 8
From there, you pick a player thats either easy to eliminate, or someone who is already on deaths door, so to speak
Gilanra helps to minimize the risk by drawing you cards, and Brinelin will bounce problematic nonland permanents to help you control the board
There are some reprints here that feature updated rules text and typesetting to make them easier to understand and play in the Limited environment
If its easier for you to visualize it this way, think of your total card percentage in regards to your casting of a seven-drop