You can play it well and need at least 2 defenses. I used Griffin Stream three times. It is very important to see that you have operated my VS 12 secondary defense.
The blood-filled Griffin was black after being hit by two bats, which means that two bats died in vain when it was sent back from the shelter. I started the plastic surgery manually. Pay attention to exchange and preservation, and send it back if there is no blood. It is very important to replenish 1 group. As long as the Griffin has 2+ survival, it is easy to deal with a bat wolf with 50 people riding a white cow. The conclusion was reached after many battles. Also, after 2-3 Griffins upgrade their sputtering attacks, you must steal an orc's burrow, so that it will have no population and be forced to fight in advance, or 3 WS books, as long as it doesn't mine. You have a good chance of winning.