Couple of things that I did and in no way is this an endorsement for others. Do it at your own risk.
Clipped the trigger spring in very small increments (1/4 of a turn at a time), reassembled, paying attention to the spring tension/trigger/trigger pin "relationship" and settled on 3lbs or slightly more, can't remember at the moment.
Then I addressed creep by first polishing the sear MAKING SURE that it was done correctly = square. Checked creep repeatedly and the last bit was removed by shortening the length of the sear with a very fine file. Again, square.
It took awhile but it worked very well. Brownells, Wolff
http://www.gunsprings.com/ and ernie the gunsmith sell reduced power springs.
Ruger IMHO: