The Sentai Filmworks and HIDIVE streaming release list the shows in a chronological order of the events set during in series, which explains the contrasting art styles between those of the main series and the high contrast animation typical of mid-late 1990s anime. This is also noticeable by the change in opening credits from one story arc to another.
The chronological order are as this below.
-Spiral Labyrinth (S2, 1-14)
-Valley of White Silver (S1, 1-4)
-The Mutineer (S2, 15-18)
-The Duelist (S2, 19-22)
-The Retriever (S2, 23-26)
-A Hundred Billion Stars, a Hundred Billion Lights (S1, 13-24)
-The Third Battle of Tiamat (S2, 27-28)
-Disgrace (S1, 9-12)