I think the biggest problem with Honchkrow- is that the more it KO's the weaker it gets, also a well timed Acerola or Max Potion, really will set you back to square one.
Your biggest damage spreaders (in standard) are: Tapu Koko (promo), Necrozma-GX, Weavile (BUS), and Latios (SHL).
You might do better with Weavile in a best of 1 as opposed to a best of 3...because in future games your opponent just might not play their Octillery or only bench 1 Zoroark instead of 3. Additionally you might want a Mr. Mime as well as Weavile will also damage any of your own abilitied pokemon.
Latios with a choice band does (30+30) x2= 120 to a Buzzwole + your additional 30 to their bench. Thats a good chunk of damage for just a DCE.
Also with this deck concept, you'd be apt to also play Counter Energies to give you more outs to a double colorless- Because you'll likely fall behind in prizes, and if you do I think a Watch & Learn- Sudowoodo might be a good addition that could copy a Beserk or Nature's Judgement. (Which actually get you OHKOs as opposed to setting up Honchkrow- but still will keep you in the game)- But against other attackers still might load up quite a bit of damage.
Hope this helps!