You got that about right.
You could really just strike EXP party and Solo camping completely form the list. It's not Viable, and that's by intentional design. They do not want people monopooizing areas killing the same monsters repeatedly for character advancement. They want you to level through playing content.
Here's a revised list for you - granted, this is pure personal impressions.
1. Dungeons (first and consecutive runs.)
2. Guildhests (first run)
3. Storyline Quests
6. Guildhests (consecutive runs)
7. Guildleves/Grand Company Leves
Note that Sidequest's vary greatly in value and are mostly done in groupings, therefore their individual value may indeed be lower. However collectively they tend to provide more EXP yield over time than repeat Guildhests or Leves.
Over all, I really like the changes they've done with the EXP system. They've incorporated monetary and gear rewards to what was usually the daily mob grind with no additional perks. And with the way the content flows together and Duty Finder helping groups get together (when it works >.>) the wait time for getting parties to xp with is so much shorter trying to go at it solo.