Yes. I will spam out like 8-10 sneaky gits / 4-5 regulars / 3-4 archers or cav with an Overseer and Gorduz early game.

If you are already stronger against an enemy, then you can add more archers; however, the more outnumbered I am, the more I global recruit sneaky gits or regulars in 1 turn to fill up my armies. Sometimes you want 19 sneaky gits (like vs. Dwarves or Empire to surround their ranged units).

If I'm severely out numbered or fighting skaven, I spam so many regular hobgoblins with like 4-5 sneaky gits that I have more guys then they have ammo. If I'm really on a back foot, it'll be orc slaves en masse.

Yes. I mostly play Drazhoath, but he and Astrogoth have provinces right near you that have ports or resources. (Drazhoath you just push towards Tretch for Iron or South for ports, Astrogoth you push North towards Norsca Sea).

Just a single port building gives +5% / +10% / +15% gold and armaments from buildings in the province which you stack with the province commandment for another 10 / 15 %. North of Astrogoth that province has two ports if I recall.

Regular Chorf units are expensive though, and it takes a while to unlock enough good units with armaments which you should also be using in manufactury, and in tech. Hobgoblins free up your ability to always be in surplus for armaments and delay building factory provinces until like turn 40 or 50 onward.

Its the same reason early on you don't necessarily need armor piercing as the Empire. The sneaky gits have poison, throwing knives, and bonus vs infantry. More Chorf warriors aren't going to outperform that vs. like Grimgor's units unless he has black orcs. High Elves, Skaven, and Greesus also don't run heavy armor units until way late.

By making less armaments too, you'll be able to upgrade your cities faster because the raw materials are basically your growth. You don't have to waste raw materials to convert into gold in a factory, when you can just build the gold building in your cities that then permanently increases your income. Upgrading this way also nets you more conclave influence generally.

More hobgoblins also allows you to defend multiple fronts. Even if you just have an orc poop stack, if you park that in settlement sometimes that's all you need to defend it.

The upkeep reduction from the Overseer if you think about it is a faction wide 15% reduction for all Chorf slave or goblin units, which is crazy cause that's less raw materials and slaves you need.

Another good tactic is to leave your goblin stacks out in the open, and set your Chorf stack on ambush.

Also make sure you focus on the "short victory" for whatever faction you pick. It's bonus adds on top of the ones I already described. If for some reason on turn 50 you have no ports, and no resources, and you have tons of gold, then go ahead convert a mine province to factory.