Notes & Combos
This is similar to the pile deck I was using in D Cup. The reason I cut it down from a 60c pile was because I wasn't facing mill decks at all, and drawing Droplet going 2nd is the most reliable way to win. However, I have become hopelessly addicted to Normal Summon Dolphin going first.
It is simple, once you have two HEROs on the board without normal summoning (read: Faris's Increase + Vyon), make Infernal Devicer, which searches Dolphin and Neos. From there, you can see their hand and proceed with your next play as appropriate. Some examples:
Spright, Runick, Branded = Dark Angel + DPE
Mathmech, PUNK, Floo = Plasma + DPE
Eldlich, Lab, Altergeist = Liquid/Zero + Mask Change
Of course, your hand might not be able to make the boards above, Mask Change being the least accessible (usually just searchable by AHL or normal summon Liquid), but having the information helps. Also keep track what board breakers they have, don't want to make Plasma DPE into a Lava Golem, lol.
Since the Dolphin is a Warrior for some reason, it can be used as a mat for Cross Crusader later.
Another card you can consider running is EN Shuffle, it has a lot of applications in this deck, but it bricked me sometimes so I cut it.
2 ED slots were cut for the Dolphin combo, which would've been Dangerous and 2nd Dark Law for me. They are missed sometimes, but not that much.
Usually I don't want to post D5 decks unless I feel I can't make it to D1, and with Tears coming, that is my thought, so please enjoy.