The boss has 3 different abilities. One is a set of fire walls that will damage the player. To achieve this we are using the sequencer to animate the location of damage volumes and NS (Niagara systems) across the playing field.
One of the issues we ran into was that when we parent the NS under the Damage Volume Device the NS lost its ability to be scaled. The NS became a little ball of flame and didn’t respect the cube used as the particle locations. To get around this we just copy and pasted the animation keyframes to NS.
Another issue was that when animating FN props, or blueprints they would only animate once in game. To get around this animated static meshes. We also found that if a player jumps from one of the animated FN props/BP actors, they get launched.
See Bug Report: https://forums.unrealengine.com/t/major-animated-but-not-moving-actors-in-sequencer-will-launch-player/727589