Usually you’ll have a choice of one if you can build multiple pick the one that makes the most sense and ignore the other option. Chairlifts have fairly low capacity and slow but can have big supports and go up hills without issues. They’re not a profitable source of income. In a big park, these can be a good way to have guests move around. Less important that the previous two staff members imo. Browse though your path network and replace any vandalized improvements you see. You can fix vandalized improvements by rebuilding them. If there is heavy vandalism in your park then your park rating will fall. Angry guests will prowl your park and smash park improvements like lamps, bins and benches. Security guards: These guys help deal with vandalism. You’ll need enough mechanics in your park to respond promptly to any broken rides and carry out your inspections. I would advise you change big money makers like roller coasters to 10 mins and leave the lesser earners at the default. The default ride inspection time is 30 mins. Rides that are broken require the mechanic to come and repair them. Rides that are frequently inspected break less. Mechanic: These guys inspect and fix rides. You can assign them to a limited area (ie: like near the exit of your big, intense coaster) You tend to need quite a few of these guys. You want them on your paths keeping them clean so your park rating doesn’t fall. I suggest removing the ‘mow grass’ option as otherwise they’ll do nothing but mow endless grass from my experience. Handyman: These guys will clean up the vomit on your paths, water your gardens, empty your litter bins and mow your grass.