I don't know if this has already been said, but with Superman detached from the JL team base. and his SP he can reduce by 4. Two for impervious, one for his asset dial thing, and another for his sp damage power.

not true, Jack; the "asset dial thing" is only used by the team base itself. why NECA decided to print the extra text on the character cards is beyond me, when they already put it on the team base's card... having said that, afaik the other two can both trigger on an attack, and reduce by three...

They put the icon on the character cards to indicate which icon on the asset dial it triggers. This is extremely important for Nightwing and Robin, who both trigger the Robin Asset Dial power on both Teen Titans team bases. Both Nightwing and Robin have the Robin Asset Dial Power listed on their card to indicate this.