Need some advice on lategame battles

Hello,

Just started playing this game after a lan party; I watched some youtube content and decided that huns is the go to civ for me; So here is what I can do: I can go to feudal at 14 mins and castle at 26 or so; after castle age I can cavalry archer harass 1 opponent out of the game

But I play 1v1v1v1 and I’ll have to go for imperial age 1v1 the ai; I won a lot of battles but in the end he swarmed me with 140 huskarls;

So to rewind; I have 15k food; 15k wood and 5k gold

How do I close out the game vs the ai? They have a base and all; I need some army advise; like how many barracks/stables/archery rangea do I build outside of their base and what army comp do I use (a balanced army one size fits all) and how do I enter their base and destroy it?