HDMI & Selena Dream of Morale

Cassius with 5x Dream World can generate up to 24-27 Morale a turn. In comparison, 4x Devil Dice yields 11-14 Morale and the "Attack neutral + Persona" variant yields 10-13 Morale & 150% ally card damage, making Dream World the premium option for buffing HDMI & Selena's Sword Rain IV interaction.

That said, 5x Dream World requires finding 2 more copies of Dream World during a run which can be difficult. For the less fortunate, 1 more copy yields a potential 20-25 Morale (depending on divines vs. neutral cards with Morale) with no additional copies yielding 16-23 Morale, making these still superior to alternatives with minimal draw constraints.

Some alternatives if you can't find more Dream Worlds include:

• Gear Bags (+1 Morale epiphany, help in setting up).
• Explosion of Emotions (+2 Morale epiphany, +1 AP each turn)
• Divine epiphanies on Pop Eye Popper & Dice Trick (+1 Morale/Resolve)

Devil Dice with a neutral Morale epiphany or Devil Dice IV could be worthwhile alternatives to Shuffle, either netting 1 more Morale or helping to discard. I prefer Shuffle with a neutral Morale epiphany as its exhaust helps lower the chances of whiffing a Dream World or Cass/HDMI' Persona.

Nia & other Controllers with built Dream World decks can be viable alternatives, but Cassius has the greatest potential for Morale generation.

When running in the Tower or when using E6 HDMI, Selena can omit a 2nd copy of Drone Bombing, freeing up enough memory to run 2-3x Dream World. This grants her a few advantages, namely triggering Prelude to Hero & Dimensional Cube as well as increased card draw.

3x Dream World & Two Divine epiphanies requires finding 1 more copy of Dream World during a run. You can omit the two Divines for a 3rd copy of Dream World or take the two Divines for 1 less copy. Either works fairly well, but is a little less consistent.

The "Draw 1 Common Card" divine epiphany is very strong for High-Power Scope IV & Drone Bombing IV, but the standard "Draw 1" divine is easier to get and is still very good.

Due to how many attacks Selena does, Dimensional Cube gets a lot of value, but another Wedding Ring trinket is always nice and the increased damage may be overkill.

The "When 5 or more cards have been created through abilities by allies, +30% Damage Amount to Extra Attacks of this unit" engraving is extraordinarily valuable for Selena and could be worth compromising other aspects of the deck for.

I strongly recommend the Wedding Ring trinket for increased consistency (as Selena is the main DPS in this instance), but Dimensional Cube / Verdant Night are options for even more damage.

Hero to All I could be a good option as it can trigger from either the Wedding Rings or from Dream Worlds. I have not tested this option myself personally yet.