The only things that really limit Walking Ballista are: The length of the game
Whenever one of your characters wins a challenge against an opponent, you can pay one ink to draw a card
When you do, it offers some powerful disruption, but it gets a lot less powerful when you arent able to use it on turn one
Supporter recycling can be game-winning with power cards such as Boss's Orders or Professor's Research
For instance, a Supporter card like Professors Research allows you to discard your hand and draw seven new cards, which is excellent for finding key components but requires careful timing to avoid discarding vital resources
This would have been exceptional at one point, but it seems to be the new normal with Universes Beyond setsit's roughly equivalent to Marvel's Spider-Man (only 98 commanders, but that was a special small set)