I agree with Super Jackpots as a must for high scores. It's not easy by any means. Jackpots are 2 stage in FT. First get a ball into casters club, and secondly hit the upper hole to claim the timed jackpot. Do this 3 times to activate supers.
Second time around, jackpots are doubled.
My strategy...claim the 3 jackpots, then go back into single ball play.(if you've lost 1 ball) Because now, when you hit multiball again...super is lit from the start. Slam that captive ball over and over!