Xyclucian, the Chimera

Fighting Xyclucian the Chimera, he has spent most of his time on the pillars. About 4 out of the 5 minutes I've been fighting him, he's been up there breathing fireballs or shooting the poison darts. As in, shooting 4-5 fireballs, switching to darts, 4-5 fireballs, switching to darts, 4-5 fireballs switching to darts, maybe a glacial or two in the mix, and then come down for 10 seconds, then back up the pillars to repeat.

I'm getting almost no chance to attack him, which is going to lead to a half hour fight.

You need to attack the pillar! After the pillar is destroyed Xyclucian is stunned for a short time and you can attack him.