quite easy: Roll Baby Roll!!!

Don't stop moving! sTank is fast and small, so harder to hit then other tank like medium ou mammy)

Do not take any ennemy in frontal assault.... they cant see you.... get behind them, shot twice or trice, and then keep moving to recloak again!!! they hate that!!!

The roll baby roll technique also applies to infantry! they are quite easy to kill if you roll over them (a lot of people died under my stealthy weels!!!!) go behind them, they cant see you, and then roll over!!!!

here's a good exemple:
I was playing nod (d'uh!). I was ingie in (guess what) stealth tank. I was on my way back to base when I noticed a med tank shooting at my teammates and an igie behind him to repair... I could have shot the ingie... but that would have uncovered me... so I started to move toward them, not being seen.... then I rolled over the ingie, without being noticed by the med tank driver, got back a little, and started shooting the tank.... before the driver even noticed his ingie was no more, his tank was already half dead... by the time he was able to turn around and shoot, I was already gone, only to come back 3 sec later to finish my job... without even being damaged!!!

Et voila!

how to kill with a stealth tank 101

A tip for gdi... If you are able to see a stealth tank, don't let it go away! it could cause your downfall