Yeah. Partying is starting to pick up on my server. It's still slow, but it's getting there in response to the changes. You can't expect it to happen overnight. And it's pretty easy to form a party of 4 people for toto rak (or just a decent trio even, which can get you better skill points than by soloing). Give the game a few weeks/months, and a few more patches, and hopefully people will party even more. Maybe we'll even have a search people like to use.

As far as your situation, the thing "upsetting" some people I think is that it /is/ viable to level solo, and you're coming off as being upset that you're not xping as fast as someone in a party. I don't think anyone here doesn't want you to be able to solo, but most people here do want party xp to be rewarding. And if soloers go just as fast, no one will form parties. Which would let a good chunk of people down.

Healing tips have been mentioned. Second wind/blood bath/prime conditioning. I haven't seen anyone mention siphon mp or stygian spikes though. With all this up, my DD rarely runs out of mp/hp unless I'm trying something too far above my level. What to xp on can't really be fed to you since it will change every few levels. There's lots of great internet databases of ff14 mobs though. Find ones that are ~5 or 6 levels up and try that. Adjust as needed if they're too hard/easy.

Yes, it's slower xp for me when I solo too. But I'm still getting the xp. And as has been said, there really is no need to rush yourself to 50 in a game that's clearly in an unfinished state. By doing so you'll probably be missing out on the chance to play with future instances and stuff in a level appropriate manner. And that'll make you sad.