Keep in mind that this tactic helps quite a lot and for a relative low cost. It's primarily base defence but has a huge offensive potential when armed with a nuke and downed/missing enemy defences. run into the base and drop a nuke sit there cloaked and take out the engies.

BTW nothing beats running behind enamy infantry (usually snipers) and pasting a timed c4 on their back. Plop it, leave silently and then wait 15 seconds and then let the guy know. "Hey SystemX_99 You're boinked for stealing my name!"

To sum it up...the Stealth is very dangerous!! and can potentially cause more damage then any of the other characters. The stealth can also go from defensive to offensive saving you money should you have to switch roles as needs arise.