V3x missile- More Balance

I suggest you balance the the v3x missile because it is cheaper than the v3 missile and more efficient in finishing the game.

That's because it doesn't always reach its target unlike v3. Revealing the map makes it easy enough to counter it. And even if you're caught offguard you can still hear the sound of the rocket.
I do agree though that combined with level 20 stomp it's a bit too effective for its cost; but then again you can reveal the map and see exactly what vamp is doing and avoid getting stomped.

And how would you suggest to nerf it anyway?

He's asking for a price increase. V3 is harder to counter because vamp can choose to launch the missile right infront of the wall, just very few seconds for humans to react, getting the slayers blink back to base and use invul.

v3 is also easier to hit than v3x.

I believe its already balanced.