Commanders like Phenax, God of Deception fall in the first category, while commanders like Grolnok, the Omnivore, and Sidisi, Brood Tyrant fall in the second
I am in!
Niko Aris can make more Shard tokens to continue building up card advantage, especially in the late game
Fabled Passage is a strictly better Evolving Wilds/Terramorphic Expanse, and I would encourage people to consider running some amount of fetch lands, even slower/cheaper ones, as they can be recurred fairly easily, help to fix mana, and can trigger certain abilities for sacrificing permanents or permanents leaving play
Sazh and Bartz are powerful pieces of the puzzle, but what about the other 52 cards
In the rulings for Sensei Golden-Tail, which can give a creature bushido 1, we see that multiple instances of the bushido ability trigger separately, which reads to me that a card can have, like, fifteen instances of bushido 1