Complex sentence: As time passed, Helios was increasingly identified with the god of light, Apollo; however, in spite of their syncretism, they were also often viewed as two distinct gods/titan (Helios was a Titan, whereas Apollo was an Olympian).
Split into simpler sentences: As time passed, Helios was increasingly identified with the god of light, Apollo. However, in spite of their syncretism, they were also often viewed as two distinct gods/titan (Helios was a Titan, whereas Apollo was an Olympian).