Yeah, this took a bit of time and patience. But now I have all the tail weapons.
Walk backwards in medium distance to trigger its flight attack where it swoops down at you. Dodge to the side, run near the tail and quickly roll underneath it, far enough to stand still on the other side for a moment. The last part is important, if done correctly, the dragon will always try to crush you with its tail. You should be near it, but not take damage. Now you can get a few easy hits on the tail.
Use Bottles with the Sandbox option enabled (and sound enabled). So, native performance but without access to files outside the Wine prefix (virtual Windows folder where the game is installed) and without network access. This way, you don't have to worry about games phoning home, containing a crypto miner or ransomware.
Also, forget about FitGirl repacks on Linux, most don't unpack correctly.