Some advice: No matter how you play it, At very least put 2 copy of the same
monster ritual card. That way, you could freely use revendread revolution almost every time. Deck thinning is way to go. Also, putting 2 copy of hellhound make you able to at very least banish a single spell/trap before getting destroyed due to revendread revolution. It can even banish invocation at the very same turn.
Pick the first one from your field ( just set it ), and then one from your deck with revolution. You can reuse those hellhound on your next turn.
you don't wanna use revolution to gain the monster effects into your ritual monsters.you have to use your revolution to summon slayer by dumping another slayer from your deck to graveyard.
and you don't really need the 2nd houndhorede. because you can resummon it with anima. the thing that you really need is the 2nd revenants besides the 2nd sonic bird. you can play the 3rd sonic bird and one revenant but 2 sb and 2 revenants is better.
It is the only way to play IF YOU WANT TO BEAT META . Decks such as Dark magician has DMC that will banish slayer the moment it reach the field, UNLESS you do something about DMC since it was a cont. spell. using revolution by sending another slayer is only safe if your OP deck didnt have any backrow.
By sending both hondhourde from field and dedck you are guaranteed to banish annoying backrow
And you should thinking what to do with 2nd revenant since normally you cant use revolution + revenant to summon slayer, as slayer is the core of this deck. 2 revenants + slayer + revolution cant really do any good move in hand. I can say that you never play this deck against meta, no? Since you use ideal condition as if your OP will just let you summon the rituals without disruption.
Try to evaluate decks such as Darklord, Dark magician, Dragunity, GraveKeeper and Invoked. You will notice that most of them relied on spell/trap that could be a pain unless you find a way to dealt with their cards early on. Even banishing a single of it could change the tides of the duel, if you ever play against them using vendread