well, most hero synchro decks are the ones independant of the gemini support, relying more on destiny hero malicious, diamond dude, stratos and ocean
2 ocean
1 stratos
2 malicious
2 diamond dude
is all the heroes they use
after that, they use both dark and water support, from deep sea diva, mystic tomato, armageddon knight, plaguespreader zombie, and spined gillman, etc, to fuel the grave for summons with miracle fusion
they often use 3 miracle fusion and 1-2 super polymerization, but its rare for them to use polymerization
if a rough deck list is needed, I can give 1