Hit the sentinel head multiple times for multiball
Don't be too afraid of the challenging modes - Genosha Under Siege and Fiery Assault aren't too difficult and can score consistently high amounts compared to the easier modes.
(0.90) Save the City can be worth substantial amounts of points. Hit each shot three times (this can be during any multiball) and then shoot the center ramp when nothing else is going on to start it!
During Sentinel Multiball, defeat two smaller sentinels by hitting two shots of the same color. Then shoot the giant sentinel head for jackpots & super jackpot! The super jackpot can be massive!
