Burst boss skill text issues
For level 1 burst at least:
Tap specifies "tap def stacks" but he's getting the effect of all skills def stacks. It's testable in the fight and also shown via the icon in his tap's debuffs/buffs row (different from Raid 30 who does have working tap def stacks).
Slide doesn't have a number of targets for Silence specified (while normal Raid 30 does) but it's still only 1 target.