I mean they're powerful, but the user just needs to touch things with their hands, and they all turn to goo.

...

Wheel of Fortune. & Little Feet?

Ooh, nice car be a shame if it turned to goo.

Bad Company shoots, and the shrinking stands shrink before Miraschon does anything.

The Vitamin C page says it can only melt living organisms and Wheel of Fortune is a bound Stand

They can just touch them before they shoot or shrink, also why'd they target Miraschon specifically?

We can see that is melts stands, so it would melt it.

What about Devo and his miniture army? (Nvm)

Bruford runs everyone over!