Re: How to fight against the Stealth Tank?
If they go for your harvesters, try to block them with multiple missile squads. If enemy uses multiple stanks, spread your missile squads around a bit. Marauders and grenadiers hard counter them as long as stanks don‘t run away.
As GDI, try to get a hit on stanks with a predator when they decloak. But forget about chasing them - they are too fast. With some micro a stank dies in 2 hits.
As Nod, try to follow a stank with a scorpion to get additional hits off when they decloak and flee. Boosting the scorpion is also good - but do NOT boost before the stank has shot at it or the scorpion will explode.
You can try to force the stanks to shoot infantry by moving them closer. If you are lucky, enemy won‘t pay attention and fire. Now is your time to follow them with some quick units.
The strategy that works for me very well is abusing missile pads. If a stank enters a launch pad it will always decloak. So I set up orcas in such a way that the stank must cross the launchpad to fire at the orca. It decloaks, orca has defender advantage, shoots first, and destroys the stank without taking damage.
You can also leave orcas in the open field. If a stank attacks and orca is not moving, orca will have a bit of time to shoot its missiles too, potentially destroying it. Both die, but you spend 20 less. But be carefull: the orca needs time to rotate, so position them to look into the direction the stank will most likely come from.
Btw since I use stanks I guess I‘m an aśšhole a clever player. You hurt my feelings ☹️ Thanks for the compliment! 🙂