Get at least 1 miner first. This only works on really short maps, and even then, with the abundance of aggressive turtles, it's hard to get this strategy to be 100% instakill.
On long maps, if you use this, you're either really good or really dead.
No...if you can win using this strategy your opponent is an idiot (unless it's Chaos, then swordspam, maybe. But looks like this guy is just talking about a out-right rush no matter what.)
4 swords opening...opponent goes sword/archer on short map (standard opening)...gg'd.
4 swords opening...opponent goes say, 2 miner/sword on medium map (fairly decent opening on this.)...more miners = churns out more swords.
Long map...don't even try this. Just don't. Grass hills KO.
Unless you're like, in 1200s, 1300s, maybe 1400s (I've seen them go all miners on castle), don't do this...