Well, I did eventually beat the game, once of the endings anyway, have not managed to get to get to the realm of chaos yet, gonna attempt that in new game+. I quite liked this game, so I tried to play Castlevania Order of Ecclesia, which so far has been more or less the same in terms of difficulty. Realized I would probably enjoy the Castlevania games after trying this fangame. Though in my experience, King Sombra gave me the most trouble, he was harder to me than both Starlight and Daybreaker, which is weird. I have not faced Discord, the Creator and Cozy yet, who I expect to be more difficult.
Granted, I played a pegasus and ended up using an int build relying skills for most boss fights, especially Wind Slash and Tempest, using Wedding Veil for improved MP regeneration. Which I am not sure is ideal. Tended to swich to a different set of equipment with heavy armor and spear when low of MP, taking advantage of the balanced nature of the pegasus.