Base levels, plus what each job reaches at four condensing stars (light cells). The top level is 10.
MiningLv 3 out of 10→ 5★4, Lv 5 at four condensing stars
CoolingLv 3 out of 10→ 5★4, Lv 5 at four condensing stars
HandiworkLv 2 out of 10→ 4★4, Lv 4 at four condensing stars
TransportingLv 2 out of 10→ 3★4, Lv 3 at four condensing stars
Condensing raises its jobs like this:
★1 +1 Mining
★2 +1 Cooling
★3 +1 Handiwork
★4 +1 to every job
Condense it at a Pal Essence Condenser (unlocks at Lv 14) using 4, 8, 12 and 24 more Snugloo for each star (48 in all). Or feed it Starfruit ☆1 to ☆4 from the Medal trader, or a Ripe Starfruit from the Bounty token exchange. The Condenser shows the new levels before you confirm.
Hauling: grabs up to 5 items from a pile per trip (Transporting 2), runs to it at 400 and carries at 100. At four stars: Transporting 3, 10 items per trip. Compare all haulers