I hate to break it to you, but if you are having this much of a problem getting your first alt class to level 10, you are probably going to rage quit over higher levels. There are options. No, they aren't the best exp options, but they are there. Levequests, exp chains, some fates that you can solo, they will all get you there eventually. And maybe this will be a lesson to those who do every single quest on one class. Personally, I leave all side quests for alt classes, and only do the main storyline on my highest class, thereby breaking up the grinding periods. Even so, it's a challenge at times to find ways to level alt classes. But that doesn't mean SE needs to make things even easier than they already are.