Since Commanders life total starts at 40, leaving yourself with lower defenses in early turns is often completely viable to rush out big plays that your opponents simply wont be equipped to deal with
It's possible that a card will land touching a creature but then will be knocked off that creature by a later throw
Clean up after yourself, mind your language given that the game caters to children as well as adults, and just generally be a good citizen
If your Doctors companion has white in the color identity, you could tap into cards like Dinosaurs on a Spaceship, Atraxi Warden and Judoon Enforcers
She turns off activated abilities on opposing creatures, cutting off mana dorks, combo pieces, and utility threats, while her evasive body keeps life totals moving in your favor
Second of all, its not even good at leveraging the core strengths of white