Support, as for the question- how will they know who xtal'd, it should be pretty obvious when their actions reach around 20-40 higher because of the stealthy KO and a few attacks.
Nice idea it's in keeping with a stealthy action it's not impossible to work out throws a new variable into the mix and rewards teamwork and coordination.. so support .
No support, if your scared of taking inc after you ko someone, then don't war. If you want to remain "hidden" don't chase kos.. Although, the status of "hidden" against a somewhat decent EE clan, is nearly impossible. Good clans will have sweepers who will catch you pretty fast anyways. Instead of trying to figure out a way to get less inc, try and find a way to defend inc more. Cheers
This is great idea spy is meant to be stealth ..so successful ko should been shown in ally clan not in rival clan.. I support for this idea this may lead ee wars more interesting.