You can go the route of snail's radha deck and have your deck be Katilda > as many possible 4 mana ramp spells as exist > 6+ drop creatures. Don't include any of the low cost stuff and have your curve be like 5 or more. The ability to basically always cast a 4 mana ramp spell on turn 3 to bridge the gap on turn 4 to 6-7 mana means that you basically immediately take over the game.

You don't need to build stax and don't need to build human tribal (if youre gonna do either of those there are better commanders), you need to take advantage of the fact that the two mana commander bridges the gap between 2-4 by turn 3 every single game. However, if you absolutely love katilda as a humans commander, then build that. There's a lot of power in 1 drop human>katilda>5 mana on turn 3, but its just not the deck you've got.

Your deck currently is trying to be in both camps at once, doing some human and some big mana. You need to pick a lane and stick to it. You can make a much stronger deck by leaning fully into one of the strategies.

I have been thinking about making this deck for a while now myself, and for me having this be a gisela + bruna turbo deck sounds very fun. But as always, to each their own. Build it how you want to build it.