Sorry, but this combination is not a good one IMO. Specifically, making a saucer shoot SDTM. That's just cheap, and combine with a tight tilt for no fun and pissed off players.

A lot of EMs have conservative/liberal settings for things via jones plugs under the PF.
But lots of good advice in this thread!

Tight tilts are good, but TOO tight is not very fun, so try to use "super tight tilt" as a last resort.
Slingshot adjustments can be a BIG diff. in play, getting a great tourney-ready adjustment will probably require cleaning the switch and a fresh rubber helps prevent chatter, as well as playing nice. (I say new rubber on bottom half of PF when u can B4 comp.)
Fresh wax, outlane posts, and game settings (software) are easy things with big benefits too.

Some games are just going to play long, esp. when a good player has a good game, that's kinda the idea of pinball.
But if everyone is having a long game, it's time to make a change.
Good luck, I think adjusting games in these ways is a very fun thing to experiment with.