From me, Andy, and the rest of the Scrap Trawlers, take care
Triumph of the Hordes helps you to close out games quicker by giving your creatures infect for the turn, meaning they only have to deal ten damage to take someone out of the game.
Against a board wipe, you can sacrifice creatures before it resolves to get value or trigger dies effects
Nevertheless, if it can stay on board, it can turn a game around
In Commander, Rowan is better in some ways as the Commander since life lost this turn is easier to pay for free with things like Phyrexian mana costs or cycling Street Wraith
His other ability "Pounce" also means that Simba gains the "Evasive" trait, so he can also challenge characters with Evasive