As an experiment - try rolling all but 1 die for your defense. If you haven't fully cancelled the hits yet (including if you spent the focus token) go ahead and roll 1 more for the stealth. If you start rolling that way, you might start seeing how often the stealth is actually used / how much it blocks.
This is pure brilliance. I will try that.
However I don't have to FULLY cancel the hits - IE if the attacker rolls 3 hits... I would only need to roll 1 additional focus / evade to equal the benefit of the extra shield. So even if I lost the stealth device on the first attack, it could still equal the damage reduction of the shield upgrade.
But still good point and god idea.
Edited by Crabbok