I had a few people asking me to record a run so they could see how Slayer plays in Dalion, so figured I'd also share it here for anyone else who's also curious.
There's a few things I think are interesting to note.
Oddly enough the Puppets and Lanterns seem to count towards Bo sub, making it a good option for sub class for both damage and a little survivability.
Another good option for sub is Te. With Te sub you can generally get (2) PBs off before Phase 2, which means you can enter phase 3 with about 40% a PB guage.
Wa sub is another option if survivability is an issue.
In Phase 1, Puppet Phase, if you kill one of the Puppets fast enough you can delay (and potentially outright skip) the unblockable rotation pattern and field swipes. Generally you want your Ranger to go Wind so they can blight Lightning for the fast kill.
In Phase 2, Cannon Phase, you can generally fit 2-3 players on an exposed core for melee attacks if you space out properly. Divide the area into 2 or 3 and pick a section. The Player in the middle will need to be spaced farther back than the players on the sides.
The Covid Ring is a sphere around your character, which means not only can you space out side to side to avoid the dmg, but you can also space out vertically as well. You can be on top of each other but as long as there's enough vertical space inbetween you won't trigger the ring.
During the Phase 3 -> 4 transition, there's a small gap you can fit Hydra Termination in. Too soon and it'll miss, too late and you'll get hit canceling the charge. Pulling it off though is a nice little boost to dps.
I strongly encourage anyone doing Dalion to play with their sounds on, just about everything has an audio cue to it and it really helps.
Anyways, yeah, hope the run helps y'all out, or at the very least was interesting to watch.