Other farmers on this thread has covered it before as well.
There are plenty of bases where you can reach their DE with just farming armies(barb/arch/gob/giant/wb).
Just be patient with that "next" button, and you can find bases with great de loot without having the need for that semi-trophy hunting army.
And the training speed is much faster as well.
And as hannibal pointed out, the main dps for his combo came from wiz(long training time), some minions, and the "mandatory(2 out of 3 raids)" rage.
Compare these 2 combo.
Top is his.
Bottom is a typical farmer's combo
You can see the diff in dps, hp, training time yourself.
Anyway, don't misunderstand me that i'm hating. Merely pointing out that its not a must to use that army combo. And as a farmer, an army that requires 52 mins to build is pretty..
But as unity said before, its his life style/job, which makes an army that requires 52 mins to build alright.
If you need, toss in a rage with that farming army if you found a base with high de. Similar effect can be achieved.
And if the base is really out of your league, just press next. Its not that hard to find another base with high de.