First off, let me congratulate you on using Honchkrow. He's one of my favorites.
Now, let's look at some of the advantages of all of the moves you have selected.
Confuse Ray: confuses the foe.
According to THIS: https://pokemondb.net/pokebase/14538/does-confuse-ray-hit-a-normal-pokemon
it hits Normal-types. It would be useful, as Honchkrow isn't very durable, and that chance for your confused foe to lose a turn is pretty nice.
Although, even one hit could spell disaster for your Honchkrow.
Toxic: Poisons the foe.
Toxic is a popular move, and for good reason. It can completely cripple sweepers under certain conditions, and it dramatically reduces the effectiveness of walls that lack an anti-status move.
Honchkrow isn't a poison-type, so Toxic's accuracy is slightly less than perfect. Also, the moves you have for Honchkrow, except for Night Slash, are resisted by steel. So, toxic won't give you a huge offensive advantage. Bulkier walls might also give you trouble.
Roost: Heals you fifty percent, loses Flying-type.
This could increase your lifespan. Also, Ice and Electric attacks would only have neutral effectiveness.
However, Honchkrow is really frail, and most hits can 2HKO it anyway, even without the super-effective bonus.
Some more moves to think about:
Taunt: prevents the foe from using status moves.
This could really mess up some stallers and walls, as well as prevent Honchkrow from being set-up bait.
Again, Honchkrow's pathetic defenses mean that most opponents won't bother inflicting him with status.
Torment: prevents the foe from using a move twice in a row.
This one can work sometimes, but it takes a bit of luck to pull of.
Haze: Eliminates all stat changes.
This can be pretty useful, especially if a Swords Dance or Nasty Plot user is knocking you down.
Tailwind: doubles the speed of your Pokemon for four turns.
This could be really useful. Aids your team, and sets Murkrow up as a potential sweeper.
Personally, I would choose Confuse Ray. Almost all of the other moves listed are hindered by Honchkrow's lack of bulk.
However, Toxic and Tailwind are also decent options, and in the long run, they would probably help your team more than Confuse Ray.