Yes she needs it, not for the auto-block though (you'd need max sig for it to be reliable) but for the 3 furies that make her hit like a truck if you place armor shattered on your opponent. It also makes her an option for the buffed up node too. Also, if you happen to have a 6* or high rank 5* Black Bolt, then pair her with him and she'll get 6 furies instead of three, making her damage become just ridiculous.
Medusa 5* duped, has helped me soo much.. when she is duped you get fury and your damage really goes up..adding Black Bolt to the team, Medusa gets 6 furys instead of three, and combine that with armor shatter...crazy damage...and you will love the auto block.. I know most players these days use Mags for robots, but I rather use Medusa..a single sp1 after two mediums and you have full control over the fight.
Comments
It's nice to have but it's not Mandatory