In this particular Kingdom, developing Rats into more Develop and Highway seems like a pretty good idea. You can then develop develop into Hamlet/Island or Hamlet/Spy if you get collisions. I would definitely throw a develop into the mix, especially if the opponent contests the Highways, to get them faster.
Hamlet+Tunnel+Library can also be pretty good in a Province game, although the megaturn comeback of the Highway engine is pretty strong, I don't think there is room to build a really strong lead to overcome that, especially with so many alt-VP.
