The big difference is if you play with friends or not in my opinion. With friends you do eveything faster, even something like WP tome farming, you need to run it 10 times a week to cap tomes. Groups of full ilevel 90 gear can clear a run in around 10 minutes or less so they can easily do all 10 runs on a Monday. If you're the kind of player who will do 10 runs in the Duty Finder it will take a few days, there will be a 20-45+ minute wait for each run and the run itself can easly take 30 minutes. Playing alone or with friends makes a huge difference to the level of prgression you will get in this game. It's not as harsh as other games are like FF11 but it's still an MMO, you need other people to complete content and doing it with the same people all the time makes it faster and easier.