The stealth tanks armor is low, but the type of armor it has takes little damage to most types of projectiles.

And to correct myself.. Stealth tnak kills orca/apache in 3 hits, not 5.

8 orcas will kill a building after 2-3 shots from each one. Their weapon is very powerful.. it's worth the low armor. They are semi-homing too, and they are fast.

A stealth tank rush kills buildings much faster than a flame tank rush also.

But stealth tanks are very underrated... so they aren't used much. It's the only tank I use now. After doing some experiments I find it to be extremely good, and it's my new favorite. I've never lost a game leading a stealth tank rush.. it's very powerful, and unexpected. And in a stealth tank rush they can't see you coming so they can't prepare.. But with flame tanks they have people tell there team that you're coming and they are ready.