I hate to tell you, but looking at your current jobs levels, you're not going to be able to get into any end games lses. They all want at least 2 75 jobs, one of which must be a mage job. Sometimes you can slide by that, but it's kind of a pain.
There's always lots of people on JP and NA, but if you serious about getting CoP done or ToAU, don't hold your breath!
As far as little stuff though like nation mission or quests and such that don't take too much time, people are usually good for that.
With regards to partying, except to level sync a lot, or solo.
So basically, unless you want to spend a lot of time leveling a bunch of jobs, there's not too much for you here as far as anything spectacular.