When Ravager dies, will the abilities of Marchesa and Ravager both trigger? If you can confirm it with rules, that would be great.
If Ravager dies the modular ability will trigger. As I'm sure you are aware dies means (700.4. The term dies means “is put into a graveyard from the battlefield.”) So the trigger goes on the stack when Ravager dies. You get to pick what creature the modular ability goes on to. Then during the end step marchesa's ability will trigger bringing Ravager back. The reason the ability triggers is because Ravager had the counter when he hit the graveyard and his ability didn't actually trigger until he is in the graveyard.