The tutorial order for the tutorial decks is right here, so you can go through that experience whenever you like
Well, the high-toughness decks, for one
Comparing Jodah to Ramos, Dragon Engine is unfair, since they don't necessarily want to be in the same deck
She gives you an extra combat step the first time she attacks each turn, so your Angels can swing again before opponents have time to recover
Each of these legendary creatures have an amazing death trigger but there are 3 that are excellent for any aristocrat deck that can use them
Toughness is a fine and strong mechanic to run with, but its much better done on other commanders like Arcades, the Strategist where you have access to blue and green instead of whatever other color you get with your background