Use DVD shrink but remove some/most/all of the extras and extra audio tracks (you don't need the dolby 2.0 track if you have the 5.1 track) so it doesn't have to compress it much. Try to go no lower than 80-90% shrinking on the main movie.
asus z170-A || core i5-6600K || geforce gtx 970 4gb || 16gb ddr4 ram || win10 || 1080p led samsung 27"