I first fought Qinglong with my friends Kyoshiro Akisame and MaNuVoDanh but when i went back to Kunlun alone i sucked when it came to Qinglong stages, this is because i didnt know jack about what i was doing. I couldnt find on the Wiki how to fight the dragon alone, only the statement that it would take a long time. This should give alittle insight as to what you should do, so you are not raging when the Bandit guys tell you to go to the next level and you dont get a chance to fight Qinglong...
First, the most important thing is that you get to him... If you dont get to him in time you he will disappear in a rain cloud, and leave the battle forever...
I was also told by others this was not true, and just because you get to him quickly does not mean he will stay.
so make sure you get to him before that happens.
I first used a unmodded r5 piratesword, but anything that lets you run faster than 120 at least should be fine, considering you will probably have to get to him by running. try to get a maxspeed at the start, you dont need to flask until you secure that he will remain in battle.
all you have to really do is fight him head on, if you really want to defeat him without pushing the limit of the clock you will need defense. with those 4 small stars i had i got rocked every time i got hit with his laser blast or single tornado.
I died 4 times this battle until i finally brought him down with my JC piratesword move and true mosous.
The next time i ran into him i used the weapon i used with my firends,
my +++++ 3 bb attack and defense 2xAttk Mod support/power FFan. accompanied with
a remedy (auto refil mosou item)
This time i was lucky enough to have him spawn right next to me. This weapon was soooooo much easier to fight with as i engaged in long ranged fighting as Qinglong shot triple tornados and i dodged and Pierce blasted him repeatedly as my remedy filled up and i could use musous over and over again. The only problem was i i was running slow, so when Qinglong switched areas it took me a while to get back. I died about 3 times that battle because i didnt flask Life and was killed multiple times by his low juggle Lightning storm move. here are the pictures:
So my tips are if you are fighting alone, bring a faster running weapon, make sure you have defense, make sure you can get to Qinglong before its too late!