Tetzin, Gnome Champion I doubt well remember Tetzin, Gnome Champion as one of the objectively strongest commanders from LCI, but theres no denying its the most interesting build-around card in the set
Currently, the go-to Commander for an Aristocrats deck tends to be Teysa Karlov, who is admittedly a great choice
Standard-legal Demolition Field theoretically removes a problematic Land from the battlefield, but can actually help fix your opponents' colors (unless they don't play any basic Lands)
Preston is also unlimited value with cards like Felidar Guardian and Restoration Angel that can flicker a bunch of creatures
This opens up the slots for the Obeka list to make room for things that get her in for damage or to pump her up
Every upkeep, you can bring Aang out of his transformed state, too, netting you four +1/+1 counters, four life, four cards and four damage to each opponent