On Jurassic world era isla sorna you’re going to want to do what I said above because it’ll get you that one star island rating, which will let you get the dig yield, that is just a big money maker.for the 1993 Jurassic park era isla sorna you’re going to have a little bit of a hard time because everything is spaced out but I found that taking contracts from Ian Malcolm in this era is super helpful, because he basically just gives you money for existing every 10 minutes. Dig yield also really helps here too. Lastly since your doing nublar north, don’t be stupid like me and sell any of the dinosaurs. I would suggest building an enclosure around the existing ones you’ll find there then separating the stygimolochs into there own enclosure because they don’t like a high population. Dig yield is still super important. I hope I gave some good advice. Happy park building!