Baylan Vanishes from battle vs. Cassian FDC + Baze

the focused Datacron works correctly

1. Cassian's FDC makes it so that whenever a rebel fighter ally gains any Turn Meter, they deal damage equal to 20% of their own Max Health to undermined enemies
2. Luthen's part makes it so that whenever the summon is damaged all rebel fighter allies gain 20% Turn Meter

you used Baylan's AoE, and in the video he became Undermined like right at that moment, the AoE damaged the summon which obviously triggers the 20% Turn Meter meaning everyone deals True Damage equal to 20% of their Max Health to Baylan and that is like 6 people so that is a lot

moreover Kleya gains 10% turn meter once per turn whenever a Rebel Fighter ally is damaged, and since Baylan is undermined Cass gains 10% Turn Meter. additionally Marrok gives everyone Defense Up and since Baze gains 5% Turn Meter whenever an enemy gains a buff that's like 5 times of 20% of Baze's Max Health (who is a Tank and in the video he is Relic 10) so that's 100% of Baze's max health

Gaddayum - that's a convoluted web of interaction. Thanks! Pretty high IQ decision to put Baze there by my opponent...