I made a launched rather tightly packed Steel Corkscrew that inverts 6 times in both directions. I build it frequently in my parks because it costs under $6,000 to build. It also always has an excitement rating higher than 6.00 so it works for those build ten different coaster types each with an excitement rating higher than 6.00.
Incidentally, scenery has nothing to do with intensity. It effects excitement rating.