>>718768254 (OP)
Step 0: recruit 20 garbage units
Step 1: conquer all of your starting province
Step 2: build growth
Step 3: have your army sack nearby cities multiple times
Step 3.5: remember more battles = more experience for your general and extra money
Step 4: once your province is fully grow build switch to economic buildings and barracks
Step 5: make your first doomstack (add at least a mage they are OP)
Step 6: conquer your neighbours
Step 7: make more economic buildings(all your province except your capital must have economic buildings and agent spamming ones)
Step 8: repeat step 5 with another army and conquer everything